700r4 (4L60) problems! - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 08-15-2001, 02:23 PM
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700r4 (4L60) problems!

unreal. i was thinking of a lift and new meat on my 91 blazer, and the trans starts giving me problems. last night, i get in it, put it in drive and hear a loud bang as she goes into gear. back to neutral, back to drive and BANG! I take her down the road a bit and she doesn't want to upshift out of 1st to 2nd. i get the r's up high and bang, she goes into 2nd. same way to third. Turn around, park her and watch the idea on new wheels go right down the tubes. Last night going over everything in my head about what i need to do to pull the trans for a rebuild. Got up this morning, started her up, put her in drive...no bang, right in, nice and smooth. down the road, shifts like she never had a problem. WHATS UP WITH THIS? Anyone hear of something like this happening to these? Just a sticky throttle valve? Any help is appreciated.

- Jersey

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post #2 of (permalink) Old 08-15-2001, 03:02 PM
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Re: 700r4 (4L60) problems!

Sounds like a good time to change the fluid and filter.
At least if you don't find any metal in the pan, there may still be hope for tires and lift.
Also when you are refilling the trans you may want to add a quart of some stuff called "Transmedic" it comes in a blue can. (checker / autozone / pepboys) it actually did seem to help a weak tranny I had (Of course it will not repair broken metal, but it should help clean up any varnish or crud that might be making things sticky in there)

Scooby Dooby Doo !!!
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post #3 of (permalink) Old 08-16-2001, 08:25 AM
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Re: 700r4 (4L60) problems!

thanks scooby

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