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Author
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Topic: 4r70w help
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1fast281
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Member # 4670
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posted
 
 
Recently my car has been hitting the rev limiter (6250-6300rpm) while at WOT in drive. I have no shift kit or chip to increase shift firmness. I recently flushed the fluid with Mercon 5. Any idea why it is doing this? Thanks... ![[patriot]](graemlins/patriot.gif)
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1998 Mark VIII LSC Black/Graphite
2005 Pontiac GTO Silver/Black
Posts: 578 | From: north bay | Registered: Jul 2004
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03SVTPower
CAFords OG
Member # 518
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posted
how many miles on the tranny? could be starting to slip a bit.
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2003 Redfire "AED" Cobra R.I.P
Posts: 3481 | From: Nor-Cal | Registered: Oct 2001
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1fast281
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Member # 4670
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posted
About 20k on a brand new factory 4r70w. It usually shifts right at 6k everytime but every once in a while it hits the rev limiter, especially after I do a burnout at the track.
[ August 21, 2004, 12:15 PM: Message edited by: 1fast281 ]
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1998 Mark VIII LSC Black/Graphite
2005 Pontiac GTO Silver/Black
Posts: 578 | From: north bay | Registered: Jul 2004
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03SVTPower
CAFords OG
Member # 518
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posted
quote:
Originally posted by 1fast281:
About 20k on a brand new factory 4r70w. It usually shifts right at 6k everytime but every once in a while it hits the rev limiter, especially after I do a burnout at the track.
I have noticed that mine will sometimes downshift to hit the rev limiter. If im cruising along, lets say about 25mph, then floor it, it downshifts back to 1st just to bounce off the limiter then back to 2nd.
I have about 7k miles on a new tranny too.
![[Confused]](confused.gif) hmmm
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2003 Redfire "AED" Cobra R.I.P
Posts: 3481 | From: Nor-Cal | Registered: Oct 2001
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GTSLN97
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Member # 1849
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make sure u got the right amount of fluid after u changed it. too much or not enough can cause it to slip...
Posts: 491 | From: Bay Area | Registered: Sep 2002
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hidnn.o.s.
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Member # 1219
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posted
Tranny is not 100% healthy. When you burnout you are heating everything up inside, then running at WOT results in higher shifts. Nothing more than the tranny being ran hard.
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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