Re: surging
Originally Posted by fjungman
(Post 221267)
That could be the electric motors switching from motor to generator and back.
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Re: surging
True, but I thought that if this was the case, everyone would be experiencing it, hence my post.
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Re: surging
for awhile I thought the tranny was slipping for such a new vehicle, but understanding that the tranny is a variable electric/auto CVT made me understand and expect it to be. that means it can't do burnouts like a regular auto tranny(has anybody done it?).
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Re: surging
Actually I'll go for a more simple problem as stated before, plugs, wire plugs, or dirty injectors.......keep us posted for the dealer response.
I try a few with the burnouts, no luck at all, disconnected the traction control, but is not like I can load the "converter"...had a few spins in the dirt and that's about it :( |
Re: surging
Well, it was more then a few months before I brought it in, but finally did. Turned out it was clutch plates in the tranny. Exact notes from the dealer below. This fixed the issue I was having. Just wanted to post incase someone else experiences this as well.
Extended high speed/expressway driving required to duplicate/diagnose concern. Scan transmission operation w/tech II & found clutch (3) slip speed excessive during engagement. Surge & slip speed would occur at same time. Contact TAC. TAC instructed concern was internal. R&R transmission & disassemble for inspection. Air test 4th clutch (Clutch 3) and found excessive leakage. Remove 4th gear clutch & piston and found piston seal torn and clutches distressed. Replace 4th clutch piston & plates - replace all associated seals, gaskets and snap rings. Flush transmission oil cooler. replace filter & add fluid. Perform extended high speed/ extended high speed / expressway driving. Condition resolved. |
Re: surging
and this happens why?
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Re: surging
I don't get your question. Are you asking why did the clutch plate fail? I don't know and wasn't given a reason for it from my dealer.
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Re: surging
Yes, I was asking if there was a reason for it to fail prematurely.
Like something to do with the oil pump, or stress, or something !!! But it the give you no reason, probably was a Manufacture defect at the assembly ! |
Re: surging
Check with your dealer. I believe that there is a transmission software update for the older 2 Modes that fixes this clutch 3 issue.
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Re: surging
Glad I found this, my Tahoe is having the same issue with surging. I'll take it in before I have it give out on a road trip. Thanks for posting your results.
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