RockNRowBoat
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I recently dropped $5,000 into a rebuild of the 4L80E transmission in my 2007 Suburban 2500 4WD, after my Topdon diagnostic VCI dongle showed a code PO894, transmission component slipping. The rebuild was done by a local transmission shop that's been in business here for near 40 years run by the same owner who did a rebuild of transmission of my previous 89 suburban 2500 about 20+ years ago that worked out fine.
I've driven the Sub 5 or 6 times in town since the rebuild and twice I felt what seemed like something slipped a little when it did the gear shift at about 2,500 RPMs as I reached cruising speed of 50-55 MPH. Going on up to 70 everything seemed fine, though I didn't stay at 70ish more than a couple of miles since the speed limit is 45 on that stretch of road.
The shifting of all gears is a lot smoother than it was prior to the rebuild, but those two times I felt something slipping up at the last gear shift worries me.
I have 11 months left on the 1 year warranty on the rebuild. I'll be taking it to the shop next week per their instructions to let them check fluid basically I guess.
What should I ask for and expect when I tell the owner of the shop about the slippage I felt when I take it in?
What happens inside a transmission to cause that slipping feeling? It doesn't mean the transmission pump rotor has shattered again does it?
I really appreciate any knowledge and advise you folks might share with me. That $5,000 repair stung the heck out of this retiree's budget, so I sure don't want to have to repeat it in a year or two.
I've driven the Sub 5 or 6 times in town since the rebuild and twice I felt what seemed like something slipped a little when it did the gear shift at about 2,500 RPMs as I reached cruising speed of 50-55 MPH. Going on up to 70 everything seemed fine, though I didn't stay at 70ish more than a couple of miles since the speed limit is 45 on that stretch of road.
The shifting of all gears is a lot smoother than it was prior to the rebuild, but those two times I felt something slipping up at the last gear shift worries me.
I have 11 months left on the 1 year warranty on the rebuild. I'll be taking it to the shop next week per their instructions to let them check fluid basically I guess.
What should I ask for and expect when I tell the owner of the shop about the slippage I felt when I take it in?
What happens inside a transmission to cause that slipping feeling? It doesn't mean the transmission pump rotor has shattered again does it?
I really appreciate any knowledge and advise you folks might share with me. That $5,000 repair stung the heck out of this retiree's budget, so I sure don't want to have to repeat it in a year or two.
