[Transmission] 700r4 shift problems

[blazerguy88]

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i went out for a drive today and my blazer will shift into 2 and then it will high rev and wont shift to 3rd i added tranny oil and limped home does anyone have any ideas?

[38377k5]

Probably time for a new trans. At the very least, have a transmission shop look at it to determine the problem.

If you need a new trans, I would recommend a GM remanufactured trans. IMO, most of the rebuilt 700R4's out there are shady at best.

[blazerguy88]

ya thats what i thought how much do you think that will run me for? around $2,000

[darryl]

does it go to neutral on the 2-3 shift or does it just stay in 2nd ?

[Badbowty75]

Im not sure if this could be it or not but i know the if it has a TV cable they can wear/stretch and cause problems.

[blazerguy88]

Originally Posted by darryl

does it go to neutral on the 2-3 shift or does it just stay in 2nd ?

it stays in 2nd but it sounds but it sounds as if im reving it in neutral that whining noise

[darryl]

3/4 clutch set is shot , sorry but its time to rebuild it.
if you decide to rebuild yours do the following for a tough rebuild

superoir shift kit
4l60e hicap band will hold and work really good
use a 4l60e torque from 94 to 96 fully furnaced brazed and you can pick your stall from the following 1425 1600 1800 2000
use either a alto pack or thin steels and the green fuzzy 3/4 frictions and set the clearance to .030-.055
always use a new input sprag
always use a new sunshell never ever use one again !!!

the above will give you a strong reliable trans and the changes do not cost a lot more than a "normal" rebuild which is why that is the only way we rebuild our stuff.

there are a few little things you could do such as increasing lube to the rear planet , notching the 2 sun gears for lube , replacing the check ball set for servo accum with a plug , corvette servo , lockup in 4th only , deep 4l60e pan , 5 pinion rear planet .
i feel converting to a 13 vane pump does nothing for you .


consider installing a new tv cable if you think yours is stretched

[blazerguy88]

on a scale of one to ten, ten being the hardest how difficult would it be to rebuild a transmission?

[darryl]

start with something straight forward and forgiving like a c6 a or a torqflite, the 700 just has too many little things to go wrong and frustrate you on the first one you do yourself.
if you are helped by somebody that has built a few auto trans of any type you will be a lot better off and less frustrated.

[38377k5]

Originally Posted by blazerguy88

on a scale of one to ten, ten being the hardest how difficult would it be to rebuild a transmission?

IMO, rebuilding an auto (especially one like a 700R4) is right at the top of the scale. I can setup diffs, have rebuilt several manual transmissions/t-cases, etc. but I am still afraid to touch an automatic transmission.

Its basically the only thing I don't feel comfortable messing with

[blazerguy88]

ok thanks guys for all the help i think ill go to the junk yard and see what they have there