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  #11  
Old 04-25-2022, 10:57 PM
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my X5 was probably spared a similar fate this week

I just returned from a 500 mile, five-day camping trip, where I towed my 2250 lb squareback trailer at mostly excessisive speeds, over two states. My '01 X5 3.0i stayed home, and my '04 Chevy 2500HD 6.0L did the towing.

I'm currently having a self-deflating tire(s) problem https://xoutpost.com/bmw-sav-forums/...bolts-e53.html, my fuel pressure regulator may be failing (or not), and the amount of gear I carry camping needs paring-down to transfer from my 8-ft truck bed in order to fit in the miniscule X5 trunk, before it gets to go camping.

Nevertheless, if I had taken the X5 instead, I would've towed at mostly 75-80 mph, regardless, just to keep proper spacing on highways, byways, and country two-lanes; if not, I think that I might've been involved in a collision, due to careless drivers failing to maintain even moderate spacing between cars. It seems like everyone wants to tailgate and/or gawk at my trailer from close-up (it's unusual, and different, and draws attention like my drag-race Chevelle used-to, when towed), so I have to speed up to maintain space, and avoid blindspots.

Though the X5 runs great, I'm not sure if it would've liked the bad roads, whoop-de-do road heaves, and overall tossing around I had to subject my HD & trailer to, while on the trip. If I could've taken the X5 (after sorting out the tires & FPR? problems), I still haven't converted the four-way trailer wiring to seven-way, in order to use the trailer's electric brakes (I relied on both those, my truck's 4-wheel discs, and the tow/haul transmission braking when someone would suddenly pull blindly in front of me on I-30 east of Dallas...3x).

But all is not well with my truck either, the transmission is slipping on takeoff in first, from a dead stop, but is fine otherwise, and perfect if using higher line-pressure in tow/haul mode. A little bit of Lucas Transmission Fix will solve that (it has worked before, 25k miles ago), but it was doing that before the trip started. If the X5 had been used, then who knows if the 5L40E would've fared any better than the OP's? The 4L80E was built for towing.
__________________
01 BMW X5 E53 3.0i, 5L40E, 7/13/01
topas-blau, Leder-Montana grau

Here:
14 Lexus ES350 3.5L, U660E
09 HHR Panel 2.2L, 4T45E
04 Chevy 2500HD 6.0L, 4L80E
98 GMC Sierra 1500 5.7L, 4L60E

Gone:
66 Chevelle Malibu 2dr, 327>427c.i., TH350>PGlide/transbrake
08 Cobalt Coupe 2.2L, 4T45E
69 & 75 C10s, 350c.i., TH350
86 S10, 2.8l V6, 700R4
73 Volvo 142 2.0l, man4
73 VW SuperBeetle 1.6l, man4
64 VW 1.2l, man.4
67 Dodge Monaco 500 2dr, 383 c.i., A727
56 Chevy 210 4dr, 265 c.i., PG

Last edited by workingonit; 04-26-2022 at 12:53 PM.
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  #12  
Old 04-26-2022, 12:46 PM
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Quote:
Originally Posted by workingonit View Post
I just returned from a 500 mile, five-day camping trip, where I towed my 22250 lb squareback trailer at mostly excessisive speeds, over two states. My '01 X5 3.0i stayed home, and my '04 Chevy 2500HD 6.0L did the towing.

I'm currently having a self-deflating tire(s) problem https://xoutpost.com/bmw-sav-forums/...bolts-e53.html, my fuel pressure regulator may be failing (or not), and the amount of gear I carry camping needs paring-down to transfer from my 8-ft truck bed in order to fit in the miniscule X5 trunk, before it gets to go camping.

Nevertheless, if I had taken the X5 instead, I would've towed at mostly 75-80 mph, regardless, just to keep proper spacing on highways, byways, and country two-lanes; if not, I think that I might've been involved in a collision, due to careless drivers failing to maintain even moderate spacing between cars. It seems like everyone wants to tailgate and/or gawk at my trailer from close-up (it's unusual, and different, and draws attention like my drag-race Chevelle used-to, when towed), so I have to speed up to maintain space, and avoid blindspots.

Though the X5 runs great, I'm not sure if it would've liked the bad roads, whoop-de-do road heaves, and overall tossing around I had to subject my HD & trailer to, while on the trip. If I could've taken the X5 (after sorting out the tires & FPR? problems), I still haven't converted the four-way trailer wiring to seven-way, in order to use the trailer's electric brakes (I relied on both those, my truck's 4-wheel discs, and the tow/haul transmission braking when someone would suddenly pull blindly in front of me on I-30 east of Dallas...3x).

But all is not well with my truck either, the transmission is slipping on takeoff in first, from a dead stop, but is fine otherwise, and perfect if using higher line-pressure in tow/haul mode. A little bit of Lucas Transmission Fix will solve that (it has worked before, 25k miles ago), but it was doing that before the trip started. If the X5 had been used, then who knows if the 5L40E would've fared any better than the OP's? The 4L80E was built for towing.
While I was very pleasantly impressed by the E53's towing capability, I would have absolutely no interest in towing nearly four times its rated load. If I'm going to tow heavy, I've got an LBZ/Allison to do it.
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2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


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  #13  
Old 04-26-2022, 12:52 PM
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Quote:
Originally Posted by nick325xit 5spd View Post
While I was very pleasantly impressed by the E53's towing capability, I would have absolutely no interest in towing nearly four times its rated load. If I'm going to tow heavy, I've got an LBZ/Allison to do it.

There is no such thing as a 22,250lb camper trailer -- that was surely a typo. Even the longest fifth-wheels top out around 15,000lbs. I am guessing he meant 2,250lb. Which would be very easy to carry with an E53 or almost any cute-ute.
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  #14  
Old 04-26-2022, 12:56 PM
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Quote:
Originally Posted by Bdc101 View Post
There is no such thing as a 22,250lb camper trailer -- that was surely a typo. Even the longest fifth-wheels top out around 15,000lbs. I am guessing he meant 2,250lb. Which would be very easy to carry with an E53 or almost any cute-ute.
I think that toy haulers can end up there, but fair enough. I was wondering how a bumper pull would be *that* heavy.
__________________
2011 M3
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2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

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  #15  
Old 04-26-2022, 01:51 PM
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whoops, a typo

Quote:
Originally Posted by Bdc101 View Post
There is no such thing as a 22,250lb camper trailer -- that was surely a typo. Even the longest fifth-wheels top out around 15,000lbs. I am guessing he meant 2,250lb. Which would be very easy to carry with an E53 or almost any cute-ute.
HAHAHA...While my little, but heavy 4'x8' squareback trailer is about twice the weight of others, about the same or similar size, it would have to be packed with bricks inside to weigh 22250 lbs.
Name:  heavyweight 4'x8' squareback trailer with latest modifications.jpg
Views: 128
Size:  382.4 KB

I really overpack for my short trips of 4-5 days, but I'm always prepared for most conditions (spare this & that, etc.). Sometimes, I bring double what I'd need for two weeks (a habit I'll cease doing, now that I have FINALLY arrived at the exact combination of items needed for my expeditions).

The heaviest load towed using my '04 Chevy was just under 10000 lbs, while hauling five large round bales of hay (actually bent an axle on the tandem axle car-hauler trailer), but my usual load was under 7000 lbs; my truck doesn't even feel like it's towing the 4'x8' trailer, on smooth highway, but the X5 probably would have a bit more trouble, weighing less, with a shorter wheelbase and less hp/tq than the 2500HD truck has.
__________________
01 BMW X5 E53 3.0i, 5L40E, 7/13/01
topas-blau, Leder-Montana grau

Here:
14 Lexus ES350 3.5L, U660E
09 HHR Panel 2.2L, 4T45E
04 Chevy 2500HD 6.0L, 4L80E
98 GMC Sierra 1500 5.7L, 4L60E

Gone:
66 Chevelle Malibu 2dr, 327>427c.i., TH350>PGlide/transbrake
08 Cobalt Coupe 2.2L, 4T45E
69 & 75 C10s, 350c.i., TH350
86 S10, 2.8l V6, 700R4
73 Volvo 142 2.0l, man4
73 VW SuperBeetle 1.6l, man4
64 VW 1.2l, man.4
67 Dodge Monaco 500 2dr, 383 c.i., A727
56 Chevy 210 4dr, 265 c.i., PG
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  #16  
Old 04-27-2022, 08:15 AM
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I will add that an upgraded AT cooler shouldnít be too difficult to do if it keeps happening. Could be good insurance and peace of mind and a nice upgrade project. Lots of good mfrs out there.

Iím partial to CSF and installed their Boss cooler on my X5 project as my 02 didnít come with a factory oil cooler. Iíve been very happy with it. Itís a two row cooler and absolutely bulletproof. Their Universal line of coolers would work fine for a tranny application and the Boss model is nice as it has AN fittings and mounting lugs braised in already and is reversible for mounting. AN plumbing would be the easiest for sure, and you could incorporate a thermostat into the line as well if you want to decrease warmup times.

I mounted mine out front, under the bumper like an X5 drift carÖnot really, but thatís what it looks like right now. It will be incorporated into a low profile brush bar I need to design and fabricate at some point. More like have fabricated since I donít weld.
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1993 Mopar 318 Jeep Grand Cherokee - original owner
2015 V6 Jeep Grand Cherokee - the nice car for my wife
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro

Last edited by Henn28; 04-27-2022 at 08:27 AM.
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  #17  
Old 04-28-2022, 08:39 AM
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Quote:
Originally Posted by Bdc101 View Post
AM, have you installed any external transmission cooler for your towing setup?
No extra cooler. From everything I read it wasn't needed (though I'm sure it also can't hurt). I DO change my fluid regularly.

AM.
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  #18  
Old 04-28-2022, 10:05 AM
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Quote:
Originally Posted by workingonit View Post
HAHAHA...While my little, but heavy 4'x8' squareback trailer is about twice the weight of others, about the same or similar size, it would have to be packed with bricks inside to weigh 22250 lbs.
Attachment 82101

I really overpack for my short trips of 4-5 days, but I'm always prepared for most conditions (spare this & that, etc.). Sometimes, I bring double what I'd need for two weeks (a habit I'll cease doing, now that I have FINALLY arrived at the exact combination of items needed for my expeditions).

The heaviest load towed using my '04 Chevy was just under 10000 lbs, while hauling five large round bales of hay (actually bent an axle on the tandem axle car-hauler trailer), but my usual load was under 7000 lbs; my truck doesn't even feel like it's towing the 4'x8' trailer, on smooth highway, but the X5 probably would have a bit more trouble, weighing less, with a shorter wheelbase and less hp/tq than the 2500HD truck has.
The E53 is very stable towing. I remember a lot of speculation when the E53 was new that this was because the hitch is much closer to the rear axle than it is on many trucks.

I was also surprised by how well the M54 did. On the 6MT, I was able to cruise in 6th gear comfortably as long as the road was flat or only mildly uphill. (I dropped to fifth for moderate upgrades, and needed 4th on steeper hills.) That was with my race car on a heavy steel trailer - about 5,000lbs.
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


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  #19  
Old 05-02-2022, 07:10 AM
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Quote:
Originally Posted by Henn28 View Post
I will add that an upgraded AT cooler shouldnít be too difficult to do if it keeps happening. Could be good insurance and peace of mind and a nice upgrade project. Lots of good mfrs out there.

Iím partial to CSF and installed their Boss cooler on my X5 project as my 02 didnít come with a factory oil cooler. Iíve been very happy with it. Itís a two row cooler and absolutely bulletproof. Their Universal line of coolers would work fine for a tranny application and the Boss model is nice as it has AN fittings and mounting lugs braised in already and is reversible for mounting. AN plumbing would be the easiest for sure, and you could incorporate a thermostat into the line as well if you want to decrease warmup times.

I mounted mine out front, under the bumper like an X5 drift carÖnot really, but thatís what it looks like right now. It will be incorporated into a low profile brush bar I need to design and fabricate at some point. More like have fabricated since I donít weld.
Cool, this is something I'll look into if I have any more problems after the fluid change.
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  #20  
Old 09-28-2022, 05:44 AM
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Created a new post with some more towing adventures!

https://xoutpost.com/bmw-sav-forums/...3-0-could.html
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