'85 Doug Nash 4+3 help!!
Thread Starter
3rd Gear
Joined: Apr 2007
Posts: 3
Likes: 0
'85 Doug Nash 4+3 help!!
Okay so basically I have no first or second gear. 3rd, 4th, and reverse are fine. The stick basically moves freely from 1st to 2nd, 2nd to 1st. Like the gears aren't there. This unit has been rebuilt about 20,000km ago. Now this happened when the clutch fluid was low and an individual tried forcing it into 1st...then the stick went ahead and poof
1st to 2nd gone.
Now...did the linkage break somehow? I looked around and everything still seems intact...
PLEASE HELP!! ANY SUGGESTIONS ARE HELPFUL.
1st to 2nd gone.
Now...did the linkage break somehow? I looked around and everything still seems intact...
PLEASE HELP!! ANY SUGGESTIONS ARE HELPFUL.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Had the same.Selector fork inside case came loose from selector shaft .
Lift car , remove 1-2 linkage at side cover and move selector shaft by hand.
If you can't feel it move the parts inside , then shaft is loose.
Requires new selector fork.
From memory ,the round shaft through the case is only pressed/ peened on to the selector fork. Excessive force will break this connection meaning the fork does not move with the shaft
Lift car , remove 1-2 linkage at side cover and move selector shaft by hand.
If you can't feel it move the parts inside , then shaft is loose.
Requires new selector fork.
From memory ,the round shaft through the case is only pressed/ peened on to the selector fork. Excessive force will break this connection meaning the fork does not move with the shaft
3rd Gear
Joined: Nov 2007
Posts: 3
Likes: 0
My 4x3 lost reverse I messed around with rebuild kits it's a bit like trying to fix a hole in a boat with a plaster ! I ended up replacing the whole lot with a Tremec 5 speed what a difference its cut a second off the 0 to 60 time and the car is a lot more fun to drive.
Last edited by blaina; Jun 15, 2008 at 06:10 AM.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Had the same.Selector fork inside case came loose from selector shaft .
Lift car , remove 1-2 linkage at side cover and move selector shaft by hand.
If you can't feel it move the parts inside , then shaft is loose.
Requires new selector fork.
From memory ,the round shaft through the case is only pressed/ peened on to the selector fork. Excessive force will break this connection meaning the fork does not move with the shaft
Lift car , remove 1-2 linkage at side cover and move selector shaft by hand.
If you can't feel it move the parts inside , then shaft is loose.
Requires new selector fork.
From memory ,the round shaft through the case is only pressed/ peened on to the selector fork. Excessive force will break this connection meaning the fork does not move with the shaft
One the car is off the ground, check to see if the bolt that hold the shifter arm to the selector fork shaft is still there or has come loose. If the bolt is there and tight, then you will have to pull the side cover. Check the 3-4 fork and slider when the cover is off. It would be worth it to replace that fork at the same time.
What part of the tranny have you rebuilt 3 times in 5 years??
The 4-speed portion is actually a Borg-Warner Super T-10 and they are a very strong tranny. Most 4+3 problems show up in the OD unit. Either your rebuilder doesn't have a lot of 4+3 experience or is using cheap parts. There are some steps in the OD rebuilding process that are critical and have to be done right otherwise there will continue to be problems. This shop is supposed to be a good place to have the 4+3 repaired or get help.
The 4+3 is actually a good tranny and it even handled the power from the 87 and 88 Callaway twin turbo cars. As long as they are properly maintained and used correctly, they work.
