| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
09-04-2021, 09:33 AM
|
||||
|
||||
Backing issues
Strange question.
My 71 firebird has a Tremec 5 speed, 3:42 rear w factory posi /rear discs (out of a 78 ish bird. The car drives awesome but the problem is when I back. It really hates going backwards. No noises but it just seems like it wants to fight. Even just coasting w clutch in. its like the brakes bind in reverse or something. Any ideas?? Thanks
__________________
462 Yc Block, zero deck Probe forged pistons 6cc relief, Scatt Hbeam rods floating pins aprox. 10.21 CR Comp Hyd-roller cam,roller lifters,springs ect. 236 244@ .050 108 LSA .511 lift, duration 289,297 @.oo6 Edelbrock Aluminum 87cc round port heads Larger valves ,ported polished and cut Powerjection3,T2 manifold, Try-y’s Flowcooler water pump. 71 formula with TKO600,hydraulic clutch 3.42 posi and 26 inch tire. 17x9 YO Honeycombs with Nitto 555's |
|
#2
09-04-2021, 09:56 AM
|
||||
|
||||
|
If you roll to near a stop going forward on level ground without applying the brakes and then go into reverse without hitting the brakes does it still do the same thing?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#3
09-04-2021, 06:01 PM
|
||||
|
||||
|
Will give it a try. What are you thinking either way?
Thanks for responding
__________________
462 Yc Block, zero deck Probe forged pistons 6cc relief, Scatt Hbeam rods floating pins aprox. 10.21 CR Comp Hyd-roller cam,roller lifters,springs ect. 236 244@ .050 108 LSA .511 lift, duration 289,297 @.oo6 Edelbrock Aluminum 87cc round port heads Larger valves ,ported polished and cut Powerjection3,T2 manifold, Try-y’s Flowcooler water pump. 71 formula with TKO600,hydraulic clutch 3.42 posi and 26 inch tire. 17x9 YO Honeycombs with Nitto 555's |
|
#4
09-05-2021, 02:45 AM
|
|||
|
|||
|
Wheel bearings, tie rod ends, idler/Pitman arm joints, ball joints all in good condition? Control arm bushings not wiped-out?
You're sure the alignment is holding when the thrust reverses from forward to backward? How about the rear leafs? Broken rear leaf springs are epidemic on F- and X-bodies. |
|
#5
09-05-2021, 06:45 AM
|
||||
|
||||
|
What I suggested would help to narrow the issue down to being mechanical with the brakes, or mechanical with the transmission or differential , or rear suspension.
I have seen broken U bolts on the rear suspension allowvone of the rear tires rub the wheel well on reverse moves, and such slop can make the rear U joint bind up.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#6
09-05-2021, 08:53 AM
|
||||
|
||||
|
Thanks, I’ll try backing without brakes being applied prior.
Also, all suspension parts “should be good”. Less than 2000 miles on whole combo. That said, it’s been under construction for 10 years and it’s not like new parts these days are 100% reliable. My suspicion is somehow the brakes are binding but I suppose it could be the transmission. Thanks for your thoughts, I will continue looking and report if I find anything earth shattering.
__________________
462 Yc Block, zero deck Probe forged pistons 6cc relief, Scatt Hbeam rods floating pins aprox. 10.21 CR Comp Hyd-roller cam,roller lifters,springs ect. 236 244@ .050 108 LSA .511 lift, duration 289,297 @.oo6 Edelbrock Aluminum 87cc round port heads Larger valves ,ported polished and cut Powerjection3,T2 manifold, Try-y’s Flowcooler water pump. 71 formula with TKO600,hydraulic clutch 3.42 posi and 26 inch tire. 17x9 YO Honeycombs with Nitto 555's |
|
#7
09-06-2021, 12:10 PM
|
||||
|
||||
|
I would suspect it has something to do with the driveshaft angle being too steep.
__________________
Triple Black 1971 GTO |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
