4:11 gears in an 85
11-19-2000, 07:51 PM
#1
Junior Member
Thread Starter
Join Date: Oct 2000
Location: Wichita, KS, USA
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
4:11 gears in an 85
me and my dad got a good deal on a 79 camaro with a 350 th400 tranny and a rear end with 4:11 gears. will the rear end fit in my 85 or do i need something else. will i also need to shorten or lengthen my stock drive shaft.
------------------
------------------
11-19-2000, 08:29 PM
#2
TGO Supporter
won't fit. the 2nd gens used a differant rear than the thirdgens, plus you have the torque arm to deal with.
------------------
-=ICON MOTORSPORTS=-
1st & 3rd
------------------
-=ICON MOTORSPORTS=-
1st & 3rd
11-19-2000, 08:33 PM
#4
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,123
Likes: 0
Received 123 Likes
on
104 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
The gears themselves won't work in the third gen. Wrong size
The diff will fit, size wise, but that's all. The 79 uses leaf springs. 82-00 use coils and a torque arm. You would need to move all the mounting hardware from the third gen diff over to the 79. Then you need to find some way of mounting the torque arm. It's the torque arm mounting that makes diff swapping into a third gen almost impossible. Aftermarket 12 bolts have a mounting pad cast into the housing and ford 9" diffs have an available mounting bracket that just bolts on.
------------------
Stephen's racing page
87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season
Best results before the 383 blew up
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662
Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association
87 IROC bracket car
91 454SS daily driver
95 Homebuilt Harley
The diff will fit, size wise, but that's all. The 79 uses leaf springs. 82-00 use coils and a torque arm. You would need to move all the mounting hardware from the third gen diff over to the 79. Then you need to find some way of mounting the torque arm. It's the torque arm mounting that makes diff swapping into a third gen almost impossible. Aftermarket 12 bolts have a mounting pad cast into the housing and ford 9" diffs have an available mounting bracket that just bolts on.
------------------
Stephen's racing page
87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season
Best results before the 383 blew up
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662
Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association
87 IROC bracket car
91 454SS daily driver
95 Homebuilt Harley
Thread
Thread Starter
Forum
Replies
Last Post
UltRoadWarrior9
Transmissions and Drivetrain
3
09-02-2015 08:24 PM
