Lost the Transmission Today - WED 10/2 Update
*Update at end of thread* Well at 144K miles it finally gave up. Had a great drive today down to Western KY for some camping. Campsite was challenging to say the least...trees on both sides of th...
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Finally home! Truck seems to have more power...will have to take it out without the trailer and see how it feels. I drove from the shop to the CG to hitch up, so have about 23 miles of break in time....
The first 30 mins or so of the trip were terrible...I couldn't select 3rd gear manually, it kept wanting to downshift to 2. It finally smoothed out and runs awesome now. I think the issue was the computer not having enough re-learn time with the new transmission before towing with it. Once the trans computer figured out what it was doing all was well.
Yes, lines and cooler were flushed, as you would any time the trans is removed for replacement or rebuild. What's nice is that labor and parts are both warranteed...as long as the unit was installed by a certified Jasper dealer.
I will call and verify the fluid....but the ONLY fluid approved by GM for the 4L80E and their other transmissions is Dex VI...the ONLY exception that I am aware of to Dex VI is the Ally. Did extensive research on this when I changed the fluid in April, deciding whether to stay Dex III (which is no longer Dexron but sold as "Dex/Merc") or go with Dex VI.
The shop advised no break in was required, and I confirmed that with a few transmission guys I know.
This is what kept me off the road an additional week:
Broken flange on the right front pipe where it bolts to the manifold. Note crappy weld job from previous repair attempt that I was not aware of.
Had to order the whole pipe, was a GM only part.
The first 30 mins or so of the trip were terrible...I couldn't select 3rd gear manually, it kept wanting to downshift to 2. It finally smoothed out and runs awesome now. I think the issue was the computer not having enough re-learn time with the new transmission before towing with it. Once the trans computer figured out what it was doing all was well.
Yes, lines and cooler were flushed, as you would any time the trans is removed for replacement or rebuild. What's nice is that labor and parts are both warranteed...as long as the unit was installed by a certified Jasper dealer.
I will call and verify the fluid....but the ONLY fluid approved by GM for the 4L80E and their other transmissions is Dex VI...the ONLY exception that I am aware of to Dex VI is the Ally. Did extensive research on this when I changed the fluid in April, deciding whether to stay Dex III (which is no longer Dexron but sold as "Dex/Merc") or go with Dex VI.
The shop advised no break in was required, and I confirmed that with a few transmission guys I know.
This is what kept me off the road an additional week:
Broken flange on the right front pipe where it bolts to the manifold. Note crappy weld job from previous repair attempt that I was not aware of.
Had to order the whole pipe, was a GM only part.
