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Old 01-01-2019, 10:14 PM
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740ilDuke 740ilDuke is offline
Join Date: Oct 2011
Location: Greenville, NC
Posts: 416
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Wow, thanks Phil. That's a ton of information.

The X5 has 107k miles on it. It shifts perfect until it
gets warm and then loses it's mind. Upper gears seem fine, so
when I drive it (hardly never until this is fixed) I start in M-3 and
drive easy until up to speed and shift into M4 & M5.

Im not a transmission expert by any stretch, but appreciate the insight
and knowledge you've shared.

Here's the shop that's rebuilt a VB for me in the past.

A gentleman about 90 miles away will rebuild the transmission for $900
& a shop in Chicago is charging $250 to reman the L51. VB another $600.

I'd considered a flush, but would rather just rebuild it instead of some now and some later. One shot and check all the boxes is what Im after.

What fluid is recommended?

Originally Posted by RRPhil View Post
If the mileage is high it may be worth getting a Sonnax main pressure valve fitted. Worth doing a vacuum test first, but I find that I need to replace quite a few.

Unlike the 6-speeds, the solenoids on the 5HP24 are generally very reliable

Based on your symptoms, itís also worth checking that your upper valve block doesnít have a crack in the SV-1/KV-F circuit

01' DINAN 7 S62 Swap - Stratus Grau
(1587 produced in SG 440)
02' 4.6is DINAN X5 S2 Supercharged
833/3258 produced | 1/27 Dinan X5's
85' BMW 635csi, 60k miles
Greenville, NC
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