Slipping Badly in Reverse
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,614
Likes: 3
From: Richmond Va
Cruise-In VI Veteran
Slipping Badly in Reverse
I posted this on the General Message board and got little help. I hope posting here brings me better luck.
86 L98 w/ 4+3 trans. Slips terribly in reverse. Cannot get up slight incline in reverse. I can roll/pop start it in reverse. Does not seem to slip in forward gears. O/D seems to work properly. Goes in when I hit the switch, comes out when I floor it, goes back in when I back off, and turns off when I stop. I am completely boggled.
Any help would be greatly appreciated. I have no idea whether its the clutch, tranny, or the O/D unit.
Bob
86 L98 w/ 4+3 trans. Slips terribly in reverse. Cannot get up slight incline in reverse. I can roll/pop start it in reverse. Does not seem to slip in forward gears. O/D seems to work properly. Goes in when I hit the switch, comes out when I floor it, goes back in when I back off, and turns off when I stop. I am completely boggled.
Any help would be greatly appreciated. I have no idea whether its the clutch, tranny, or the O/D unit.
Bob
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,614
Likes: 3
From: Richmond Va
Cruise-In VI Veteran
Taking it TO Dealer
I dropped it off at my reliable handy dandy Chevy dealer with a top notch Vette mechanic to figure this out. I will post next week when I get back to let you know what the problem was/is in case anyone else has this issue. Driving me nuts
Bob
Bob
Racer
Joined: Dec 2003
Posts: 277
Likes: 3
Originally Posted by Kanmer
I posted this on the General Message board and got little help. I hope posting here brings me better luck.
86 L98 w/ 4+3 trans. Slips terribly in reverse. Cannot get up slight incline in reverse. I can roll/pop start it in reverse. Does not seem to slip in forward gears. O/D seems to work properly. Goes in when I hit the switch, comes out when I floor it, goes back in when I back off, and turns off when I stop. I am completely boggled.
Any help would be greatly appreciated. I have no idea whether its the clutch, tranny, or the O/D unit.
Bob
86 L98 w/ 4+3 trans. Slips terribly in reverse. Cannot get up slight incline in reverse. I can roll/pop start it in reverse. Does not seem to slip in forward gears. O/D seems to work properly. Goes in when I hit the switch, comes out when I floor it, goes back in when I back off, and turns off when I stop. I am completely boggled.
Any help would be greatly appreciated. I have no idea whether its the clutch, tranny, or the O/D unit.
Bob
Thread Starter
Drifting
Joined: Sep 2004
Posts: 1,614
Likes: 3
From: Richmond Va
Cruise-In VI Veteran
Bad OD?
Thanks for the info, Frank. I am actually leaning in that direction myself but the mechanic at the Chevy dealer swears its the clutch. So, to make me feel all warm and fuzzy inside I am going to replace the stock clutch with a Zoom Clutch kit and probably replace or rebuild OD unit. 
Or do any of you think that this might do the trick? I would much rather spend $145 than $1650.00 http://www.ecklers.com/product.asp?p...3P2TMBKF1C83C9
How difficult is this to install? Any tips?
Any help on where to get new/rebuilt OD for the 4+3 would be appreciated
Bob
Or do any of you think that this might do the trick? I would much rather spend $145 than $1650.00 http://www.ecklers.com/product.asp?p...3P2TMBKF1C83C9
How difficult is this to install? Any tips?
Any help on where to get new/rebuilt OD for the 4+3 would be appreciated
Bob
Last edited by Kanmer; Oct 10, 2004 at 09:26 AM. Reason: addition
Pro
Joined: Mar 1999
Posts: 678
Likes: 0
From: Oslo, Norway
Hi. I have an 85 4+3. Had a slight nois in the transmission. Then suddenly one day It slipped in reverse. It was equivalent to when the ckutch slipped, but only in reverse.
I am sorry to say it but for me it was the overdrive unit and a bearing that turned around. I hjad also a leakage of the gearbox oil trough to the overdrive unit.The bearing had worn out some fixtures in the wall where the bearing was located. That part was difficult to get. I am living in Norway so that might be the reason. I bought a new OD of the latest issues which had strengthened that part so it should not hapen again. This was a modification done by Dough Nash. It was very expensive. I have had it fr seven years now and nothing has happened with since.
Hope you can get spares or a spare unit. The originals from 84,85 and to ...? is weak.
I am sorry to say it but for me it was the overdrive unit and a bearing that turned around. I hjad also a leakage of the gearbox oil trough to the overdrive unit.The bearing had worn out some fixtures in the wall where the bearing was located. That part was difficult to get. I am living in Norway so that might be the reason. I bought a new OD of the latest issues which had strengthened that part so it should not hapen again. This was a modification done by Dough Nash. It was very expensive. I have had it fr seven years now and nothing has happened with since.
Hope you can get spares or a spare unit. The originals from 84,85 and to ...? is weak.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski