700r4 Overdrive Problem

**langss** · 03-21-2010, 08:33 AM

Anyone with any700r4 experience...The problem is it won't stay in overdrive.It will shift into overdrive if on a slight grade,but shifts back into third on straight and level, or slight downgrade....any ideas....I have changed the fluid and filter twice.?????

**sjsingle1** · 03-21-2010, 02:25 PM

how many miles on the tranny.......maybe the band is worn??? if the band is worn dont think you can have overdrive

**langss** · 03-21-2010, 02:30 PM

104,000.

**sjsingle1** · 03-21-2010, 02:35 PM

my 700r in my 89 IROC crapped out around 100k......i lost reverse.....tear down i found that the clutches were fried ......may be time for a rebuild........and i babied my car.......no burnouts or racing

**langss** · 03-21-2010, 02:40 PM

thanks for the info....i figured as much.regards

**JaycenK** · 03-21-2010, 03:49 PM

Are you sure it is down shifting and not slipping?

**langss** · 03-22-2010, 02:08 PM

no its not slipping.Its clearly shifting.

**JaycenK** · 03-23-2010, 08:23 PM

Those use a govener that makes it shift I think. I had my trans guy explain it to me but I started to get the charlie browns teacher thing going on. WHA wha wha wha. Anyway is it a lockup and is it locking up? With that milage it may just be time to rebuild. as you can see I don't have much experiance with them but mine blew up in an 85 IROC years ago and did the same thing close to the end of it's life but it was bleeding out too. I had a bad trans mount that cracked the tail shaft and I have to give it props cause I left about 2 quarts on my then girlfriends dad's driveway and it bleed for 30min at highway speed. lol

**langss** · 04-25-2010, 11:32 AM

I'm still having the same problem.The cable has been adjusted,and it solved the problem to some degree, but not completely.Anybody have a good Transmission Shop in the San Fernando Valley.

**67CamaroRSSS** · 04-25-2010, 02:55 PM

700R4's have a tendancy to "hunt" for a gear when you're driving between 30 and 45. It can't make up it's mind if it wants to be in 3rd (1:1) or OD (.7:1). My 89 RS did that all the time.