Torque arm fab Q's
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
hardware so far
1 rh 1/2-20 rod end
1 lh 1/2-20 rod end
2 rh 1/2-20 tube end from www.colemanracing.com
2 rh 1/2-20 jam nuts
1 lh 1/2-20 jam nut
2 1/2 shoulder bolts (i'm using a shoulder bolt because it gives more surface to surface contact for the rod ends.)
2 3/8 nylon lock nuts.(for the shoulder bolts.)
2 3/8 washers.(for the shoulder bolts)
for my adjuster i cut a peice of 1" hex stock and drilled a 1/2 hole through it on a machine lathe.the threaded rods aren't all thread there stock hardware that we have in our shop.i drilled a 1/4 hole through the hex and the rod.i then had our welder plug weld the two peices together.i'll need to measure the threaded rods i don't remember the leagths off hand.
1 rh 1/2-20 rod end
1 lh 1/2-20 rod end
2 rh 1/2-20 tube end from www.colemanracing.com
2 rh 1/2-20 jam nuts
1 lh 1/2-20 jam nut
2 1/2 shoulder bolts (i'm using a shoulder bolt because it gives more surface to surface contact for the rod ends.)
2 3/8 nylon lock nuts.(for the shoulder bolts.)
2 3/8 washers.(for the shoulder bolts)
for my adjuster i cut a peice of 1" hex stock and drilled a 1/2 hole through it on a machine lathe.the threaded rods aren't all thread there stock hardware that we have in our shop.i drilled a 1/4 hole through the hex and the rod.i then had our welder plug weld the two peices together.i'll need to measure the threaded rods i don't remember the leagths off hand.
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Originally posted by oil pan 4
The drawings are for a GM 10-bolt, right?
The drawings are for a GM 10-bolt, right?
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
the only stupid question is the one that isn't asked:werd:
when done it will replace the OEM torque arm.
when done it will replace the OEM torque arm.
Supreme Member
iTrader: (1)
Joined: Feb 2004
Posts: 1,040
Likes: 1
From: High plains of NM
Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
Just wanted to make sure, becasue you were talking about makeing a TA then all of a sudden you were talking about a 9-bolt.
About how long is it over all?
I'll need to know how long to order tubing.
I bought a TA and am having it shiped over here so I can copy it.
I'm going to make mine from Titanium. I was looking at useing good old 6Al-4V alloy. I was going to use .140'' for the base and some more .78'' OD with .095'' thick wall tube.
It's for the V6. I don't know if I should make another one like this for the Z28.
The torque arm keeps the transmission and the rear the right distance apart (keeps the tail shaft from being shoved in the trans witch could damage it) and keeps the drive shaft and pinion at the right angle to each other.
About how long is it over all?
I'll need to know how long to order tubing.
I bought a TA and am having it shiped over here so I can copy it.
I'm going to make mine from Titanium. I was looking at useing good old 6Al-4V alloy. I was going to use .140'' for the base and some more .78'' OD with .095'' thick wall tube.
It's for the V6. I don't know if I should make another one like this for the Z28.
The torque arm keeps the transmission and the rear the right distance apart (keeps the tail shaft from being shoved in the trans witch could damage it) and keeps the drive shaft and pinion at the right angle to each other.
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Originally posted by oil pan 4
Just wanted to make sure, becasue you were talking about makeing a TA then all of a sudden you were talking about a 9-bolt.
About how long is it over all?
I'll need to know how long to order tubing.
I bought a TA and am having it shiped over here so I can copy it.
I'm going to make mine from Titanium. I was looking at useing good old 6Al-4V alloy. I was going to use .140'' for the base and some more .78'' OD with .095'' thick wall tube.
It's for the V6. I don't know if I should make another one like this for the Z28.
The torque arm keeps the transmission and the rear the right distance apart (keeps the tail shaft from being shoved in the trans witch could damage it) and keeps the drive shaft and pinion at the right angle to each other.
Just wanted to make sure, becasue you were talking about makeing a TA then all of a sudden you were talking about a 9-bolt.
About how long is it over all?
I'll need to know how long to order tubing.
I bought a TA and am having it shiped over here so I can copy it.
I'm going to make mine from Titanium. I was looking at useing good old 6Al-4V alloy. I was going to use .140'' for the base and some more .78'' OD with .095'' thick wall tube.
It's for the V6. I don't know if I should make another one like this for the Z28.
The torque arm keeps the transmission and the rear the right distance apart (keeps the tail shaft from being shoved in the trans witch could damage it) and keeps the drive shaft and pinion at the right angle to each other.
FYI Spohn sells a replacement TA bushing for their TA's part# 399PB
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Originally posted by 91banditt2
i will get a measurment tonight of the leagth from the center line of the forward rear end mounting hole to the very front of the TA.
i will get a measurment tonight of the leagth from the center line of the forward rear end mounting hole to the very front of the TA.
Thread Starter
Senior Member
iTrader: (1)
Joined: Jun 2002
Posts: 502
Likes: 0
From: Indiana
Car: 91 Firebird Formula
Engine: ZZ4 fast burn with TPIS mini ram.
Transmission: Viper T10 6 spd.
Axle/Gears: 3.73
Stupid question but the example you posted attaches to the trans. tailshaft like stock and your attaching yours to a crossmember insted of the trans, so will yours be shorter or did you already take that into account and just use that pic for refference?
EDIT:
I just measured a stock TA and got the same 51 3/4"
So if it is attached to a crossmember insted of the trans.
It will be shorter.
EDIT:
I just measured a stock TA and got the same 51 3/4"
So if it is attached to a crossmember insted of the trans.
It will be shorter.
Last edited by transambill; Nov 25, 2004 at 02:04 AM.
Supreme Member
iTrader: (1)
Joined: Feb 2004
Posts: 1,040
Likes: 1
From: High plains of NM
Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
Ouch, 2 pieces of 4 foot long Ti won't be cheap but I can make it cheaper than what an heavy steel edelbrock TA would cost (retail).
Senior Member
Joined: Oct 1999
Posts: 6,621
Likes: 2
Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Cool, now I can build the mount and get the rest of the stock so it'll only take me an evening of car down time
. I should link to this thread in my other topic about suspension dimensions.
. I should link to this thread in my other topic about suspension dimensions. Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Originally posted by JPrevost
Cool, now I can build the mount and get the rest of the stock so it'll only take me an evening of car down time
. I should link to this thread in my other topic about suspension dimensions.
Cool, now I can build the mount and get the rest of the stock so it'll only take me an evening of car down time
. I should link to this thread in my other topic about suspension dimensions. JPrevost if you haven't already check out www.gcfba.net
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
Originally posted by transambill
Stupid question but the example you posted attaches to the trans. tailshaft like stock and your attaching yours to a crossmember insted of the trans, so will yours be shorter or did you already take that into account and just use that pic for refference?
EDIT:
I just measured a stock TA and got the same 51 3/4"
So if it is attached to a crossmember insted of the trans.
It will be shorter.
Stupid question but the example you posted attaches to the trans. tailshaft like stock and your attaching yours to a crossmember insted of the trans, so will yours be shorter or did you already take that into account and just use that pic for refference?
EDIT:
I just measured a stock TA and got the same 51 3/4"
So if it is attached to a crossmember insted of the trans.
It will be shorter.
now i need to get under the car to take a measurment

i've cut a piece of 1 1/4" solid round stock to 2" and drilled and taped a hole for a 1/2 rod end.this peice will be welded to the top bar of the TA.my reasoning for this is i beleave that it would be stronger if the threaded rod (of the rod end)was totaly incased in metal.where as if you use a threaded insert the rod end is only half incased.
my brain hurts
i'm debating on wheither i should use a 1/2 or 5/8 rod end
Last edited by 91banditt2; Dec 1, 2004 at 10:45 AM.
Supreme Member
iTrader: (1)
Joined: Feb 2004
Posts: 1,040
Likes: 1
From: High plains of NM
Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
How thick is the metal at the tip of the TA?
I was going to make a fixed top rod end with a 7/16 female and a male link and shims and stuff. No threds exposed.
Then make an ajustable bottem one.
I was going to use a 1/2'' female on bottem with a Left hand thred. The TA end is going to have RH threds 1/2''-20 I was going to make a LH and RH trun link bolt so I can loosen some jam nuts and turn it one way or the other and change the pinion angle.
I'll keep the top some what ajustable, add or remove washers.
I know I can make the base that bolts to the rear out of Titanium no problem. It will be tricky to do with the arm part. I will get some help form the machine shop so I can get it right.
I think I'm going to try and make 2, 1 for me and maybe sell the other one.
How much are those fabed ajustable ones?
I was going to make a fixed top rod end with a 7/16 female and a male link and shims and stuff. No threds exposed.
Then make an ajustable bottem one.
I was going to use a 1/2'' female on bottem with a Left hand thred. The TA end is going to have RH threds 1/2''-20 I was going to make a LH and RH trun link bolt so I can loosen some jam nuts and turn it one way or the other and change the pinion angle.
I'll keep the top some what ajustable, add or remove washers.
I know I can make the base that bolts to the rear out of Titanium no problem. It will be tricky to do with the arm part. I will get some help form the machine shop so I can get it right.
I think I'm going to try and make 2, 1 for me and maybe sell the other one.
How much are those fabed ajustable ones?
Joined: Jun 2001
Posts: 8,028
Likes: 93
From: DC Metro Area
Car: 87TA 87Form 71Mach1 93FleetWB 04Cum
Originally posted by formula350sd
cause the trans moves under hard acceleration and in turn causes the mount for the torque arm to move
cause the trans moves under hard acceleration and in turn causes the mount for the torque arm to move
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