Hello I new to the group,But a long time reader great stuff!! Well the promble I'm having is a high RPM shifts @ light acceleration at 15-20 MPH it won't shift intill 2800 @ 3000 RPM if i let off then it well shift fine? Its all computer controled, But there are no codes.The trans is a 700R4 With elec.controlled shifts no vaccum hose.It was rebuilt last summer and a new elec. ****f pack installed. The only thing I can think of is the O2 sen. because I blew a headgaskte 2 weeks before. I let it cool off then filled it up and drove it back home (about 10-15 miles) it ran like crap and puffed a LOT of white smoke. I had it fixed and now I'm having this promble. I took it back they scaned it and no codes. They told me to take it to a transmission shop. But I would hate to do that if its just the O2 sen. and it seems to use more gas? I don't know if it's because of the high shifts or what? Please help!! PS: It's a 95 with a 350TPI with a 700R4 trans. Thank you!

Well thanks for nothing guys!

Sounds like the tranny might be slipping. Have you check the fluid level? Has the tranny ever been serviced? Could be just a dirty tranny filter.

this is a common problem with 700r4, im not a trans guy ive always reccomended tranny shop ive never had luck with servicing after this problem starts.

------------------
chris
1980 Z/28
350 .60 over stock bottom end world products torker2s 280H compcam edel.performer rpm,holly 750 dual feed.
2200 stall,- but still not done.

Just to let you guys know. It was the TPS switch. But there where no codes? I thought I would start with the cheeper one first. It cost me $22.00 and it runs better and shifts just were it should. And the gas mileage has improved too. But thanks for getting back to me! P.S.the O2 sen. was $65.00? WOW!