700r4 shifting problems - Third Generation F-Body Message Boards

joshprescottttt · 10-26-2009, 08:36 PM

ive got a 93 trans am with a 700r4. i rebuilt it about a year and a half ago. its been doing great with no problems.

but one day while down shifting from 2nd to 1st at only like 15 mph and it made a weird noise and slipped like it was in neutral.

it will not shift while in OD, but if i put it in 3rd (drive) with will shift fine from 1st-2nd-3rd then i can put it in OD and it will shift into 4th.

only problem it has is it doesnt want to shift thru the lower gears when put in OD.

i figured it was just a stuck valve, but i just pulled the valvebody and none of the valves are stuck??

it also has a transgo stage 2 shift kit

need help figureing this out!!
thanks

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ed o · 10-27-2009, 02:06 AM

fourth is applied band, forward clutches, and 3-4 clutches. all other gears except reverse all share the forward sprag which is a one way roller clutch until it is supposed to drop off in fourth.
with the noise it made and the shifting problem you describe it sounds like it's deeper than a valvebody.

joshprescottttt · 10-27-2009, 05:41 PM

but wouldnt that sprag still be okay since it will still shift thru the gears normally in drive (3rd)?

joshprescottttt · 10-27-2009, 06:15 PM

ohhh nvm, your right. when its in 3rd the overrun cluch is apllied which overrides the forward sprag enabling the gears to work

ahhh piss, gatta drop the trans =/

skiroulertx447 · 10-28-2009, 12:36 AM

what rpm does it shift at wot? i put a tranny from a 93 in my 86 and my tach is way off, at wot i bury the tach, it would be nice to know i'm not spinning that fast.

joshprescottttt · 10-28-2009, 01:55 PM

im pretty sure it shifts around 5400 or so at WOT