2005 4.8is transmission shifting / slipping issue

[amancuso]

There is no turn around time if they have it in stock. It’s good you have it out so you know which version to order. Just give them a call. Delivery was super quick.

Best of luck!

[upallnight]

There a youtube video on rebuilding the valve body for a ZF6HP26. If you are not inclined to try this yourself, the person in the video owns a transmission repair shop and he will also repair your valve body. His shop is located in New York State.

https://www.youtube.com/watch?v=MlDVqH9VEgQ&t=20s

[amancuso]

Originally Posted by upallnight

There a youtube video on rebuilding the valve body for a ZF6HP26. If you are not inclined to try this yourself, the person in the video owns a transmission repair shop and he will also repair your valve body. His shop is located in New York State.

https://www.youtube.com/watch?v=MlDVqH9VEgQ&t=20s

That’s a good alternative, but the main reason I went with revmax is because they rebuild the units with upgraded bits and machining to prevent the thing from going wrong a second time.




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[upallnight]

Originally Posted by amancuso

That’s a good alternative, but the main reason I went with revmax is because they rebuild the units with upgraded bits and machining to prevent the thing from going wrong a second time.




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Gary also rebuild the valve body and transmission with upgraded pieces from ZF. He will send the solenoid to be flow tested and only replace the solenoid that doesn't meet spec. You should see all of his videos on repairing ZF transmissions. He is so knowledgeable that BMW shops and Jaguar shops in his area send him the transmission from customers' cars to rebuild instead of doing it in house.

[Domino1968]

Originally Posted by upallnight

There a youtube video on rebuilding the valve body for a ZF6HP26. If you are not inclined to try this yourself, the person in the video owns a transmission repair shop and he will also repair your valve body. His shop is located in New York State.

https://www.youtube.com/watch?v=MlDVqH9VEgQ&t=20s

Yes, I've seen his videos many times and he seems to know his transmissions, hence why I am contemplating doing it myself using a SONNAX zip kit and new valve body plate. I have already bought new ZF Solenoids and installed it on the valve body which solved MOST of my issues, however, I still have the 4-5 shift problem. I am lucky that I have a spare valve body assembly so I do have the option of rebuilding one or getting it rebuilt while still driving. Mechanicaly inclined so I really would like to do it myself. Taking it out and resetting the adaptations is no problem since I have done it on my X a couple times now.

[Domino1968]

Originally Posted by amancuso

That’s a good alternative, but the main reason I went with revmax is because they rebuild the units with upgraded bits and machining to prevent the thing from going wrong a second time.

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I wonder exactly just what the upgraded parts are (SONNAX zip kit and other parts from them maybe?) and what machining do they actually do? As I said in previous post, I wouldn't mind tackling the job myself, but I do like that they guarantee their work.

[Clockwork]

Originally Posted by amancuso

I didn't buy just the solenoids, I bought a remanufactured valve body complete with new solenoids. The VB is upgraded with new internal bits to prevent the failures. I bought it from https://revmaxconverters.com/product...y-mechatronic/


Al.

SO glad you mentioned it was this company as I'm about to buy this and have my mech install it.
I want to do the whole rebuilt mechatronic as I worry the separator plate and or maze in the valvebody may have a problem too, not just a solenoid or rubber gasket.
Glad it worked out. I'd very excited to see if this solves the exact same issues the OP had.

[amancuso]

Two years on and the Revmax fix still going strong.

[sroth004]

Thought it worth sharing in this thread I had Gary from AAA-1, who does the You Tube videos “upallnight” mentioned, work on my trans last year. Gary was thorough and very honest, had my valves tested by Ericsson Industries, which supplies ZF parts, rather than going straight to replacing components, the result being mine needed internal seals only, no hard parts. I share this only to let the group know that he is a great resource if you are in need of this type of work and geographically reasonably to his business. I travelled 7 hours roundtrip twice, once for drop off and once for pick up, and have no question about having made that investment in my time.

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[amancuso]

Originally Posted by sroth004

Thought it worth sharing in this thread I had Gary from AAA-1, who does the You Tube videos “upallnight” mentioned, work on my trans last year. Gary was thorough and very honest, had my valves tested by Ericsson Industries, which supplies ZF parts, rather than going straight to replacing components, the result being mine needed internal seals only, no hard parts. I share this only to let the group know that he is a great resource if you are in need of this type of work and geographically reasonably to his business. I travelled 7 hours roundtrip twice, once for drop off and once for pick up, and have no question about having made that investment in my time.

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Good to know. Any links to Gary's shop? What problems was your trans having?