Caliper: Rear 79-81 Firebird Trans Am Fully Assembled
Some vehicles require two right-hand (RH) calipers, while others need one left-hand (LH) and one RH caliper, with the factory setup being LH and RH. The LH caliper is identified by an "L" stamped on the screw shaft thread and corresponds to the driver's side in the USA. Since around 2018, US suppliers have struggled to provide LH calipers, often packaging RH-threaded rear calipers in LH boxes. As a result, rebuilds frequently arrive incorrect, and new calipers are predominantly RH. This caliper design was used by Cadillac, and those who replicated it copied the RH version without modifying the piston.
We are asking you if you need these.. CALL US FIRST for the latest stock.. and tell us if your needing a caliper for LH or RH or both..:
(A) if both calipers are on the FORWARD SIDE of the DIFF..
(B) if the LHS is FORWARD and the RHS is Rear of the diff.
This then includes people who have had a disc rear retro fitted.
-------------------------------------------------------------------------------
Complete American Rebuilt Rear Calipers... Complete with new pistons, calipers fully assembled ready to add pads (pads not included) - bleed and fit.
These specifically fit the 79-81 Firebird & Trans am Rear Disc - as optioned on the 79-81 TA
They are LH (IE USA Drivers side) or RH.. they do NOT interchange.
- No deposit is required, nor do you need to return your old unit. However, do not discard the old calipers, as the pistons are difficult to source and valuable for spare parts if they are still in usable condition.
- Add disc pads if needed
-
The left-hand side (LHS) caliper features an "L" stamped at the end of the main shaft where the handbrake lever connects. This marks the American driver's side. Notably, since April 2015, some brand-new units with this designation have become available.
-
ALL.. have R on the casting. its DOES NOT MEAN RIGHT.. it's just a casting.
-
ALL HAVE Casting # 451.. not 450 or x89Hyundai.. just "451"
-
Add disc pads if needed.
-
These are genuine USA remanufactured GM original units, fully complete—not just inexpensive, unknown eBay refurbishments.
-
If you’re considering your options and need to rebuild the original rear calipers, these fully assembled units represent a smarter investment. Although they come at a higher price, they offer significantly better value compared to overhauling and sourcing costly, hard-to-find components like new pistons.
-
You get more done with this kit then doing it yourself.
- There is NO Core or old exchange unit needed on this item now.. this is supplied outright.
- CAUTION: Avoid striking or damaging the piston in these calipers, as they use screw-type recessing and expanding pistons rather than hydraulic pump-outs. Impacting them can cause serious damage, so handle with care. Each unit is thoroughly inspected before shipment.
Delivery is provided through standard road freight within Australia for orders placed and paid online. Additional charges apply for regional areas in Western Australia and the Northern Territory.
HELP: with rear disc brakes
Incorrectly bled or adjusted rear calipers
Rear calipers that have an internal parking brake with a lever can be troublesome. These calipers must be adjusted so that the piston is moved out and the pads are close to the rotor. If this initial adjustment is not made the pistons will travel outward during activation but no squeezing of the rotor will occur. This can be checked by clamping off the rear hoses and checking if the pedal gets better. Adjust as necessary.
Incorrect Booster Pin Length
The booster pin that pushes on the master cylinder must almost be touching the master cylinder piston face. A gap larger than 1/32" will begin to introduce a spongy pedal. Adjust as necessary.
Incorrect Master Cylinder
If the bore size of the master cylinder is too small for the fluid requirements of the system you will get a very poor pedal. This will happen most frequently with four piston calipers and with four wheel disc brakes. The only solution for this is to install a larger bore master cylinder or a true four wheel disc master
Bleeder Screws MUST always be ON TOP
Doing a brake custom job.. then remember that the bleeder screws on calipers must be at the 12:00 position on the caliper to allow all the air to escape during bleeding.
A very common mistake installers will make is to reverse the side the caliper goes on giving you a situation where the caliper bleeder screw is facing down. It's also common to use the wrong caliper on a bolt on disc kit giving a situation where the bleeder hole is shifted from the 12:00 position producing a pocket of air at the top of the caliper bore which can not be dislodged. Check your bleeder hole orientation.
Couldn't load pickup availability
Some vehicles require two right-hand (RH) calipers, while others need one left-hand (LH) and one RH caliper, with the factory setup being LH and RH. The LH caliper is identified by an "L" stamped on the screw shaft thread and corresponds to the driver's side in the USA. Since around 2018, US suppliers have struggled to provide LH calipers, often packaging RH-threaded rear calipers in LH boxes. As a result, rebuilds frequently arrive incorrect, and new calipers are predominantly RH. This caliper design was used by Cadillac, and those who replicated it copied the RH version without modifying the piston.
We are asking you if you need these.. CALL US FIRST for the latest stock.. and tell us if your needing a caliper for LH or RH or both..:
(A) if both calipers are on the FORWARD SIDE of the DIFF..
(B) if the LHS is FORWARD and the RHS is Rear of the diff.
This then includes people who have had a disc rear retro fitted.
-------------------------------------------------------------------------------
Complete American Rebuilt Rear Calipers... Complete with new pistons, calipers fully assembled ready to add pads (pads not included) - bleed and fit.
These specifically fit the 79-81 Firebird & Trans am Rear Disc - as optioned on the 79-81 TA
They are LH (IE USA Drivers side) or RH.. they do NOT interchange.
- No deposit is required, nor do you need to return your old unit. However, do not discard the old calipers, as the pistons are difficult to source and valuable for spare parts if they are still in usable condition.
- Add disc pads if needed
-
The left-hand side (LHS) caliper features an "L" stamped at the end of the main shaft where the handbrake lever connects. This marks the American driver's side. Notably, since April 2015, some brand-new units with this designation have become available.
-
ALL.. have R on the casting. its DOES NOT MEAN RIGHT.. it's just a casting.
-
ALL HAVE Casting # 451.. not 450 or x89Hyundai.. just "451"
-
Add disc pads if needed.
-
These are genuine USA remanufactured GM original units, fully complete—not just inexpensive, unknown eBay refurbishments.
-
If you’re considering your options and need to rebuild the original rear calipers, these fully assembled units represent a smarter investment. Although they come at a higher price, they offer significantly better value compared to overhauling and sourcing costly, hard-to-find components like new pistons.
-
You get more done with this kit then doing it yourself.
- There is NO Core or old exchange unit needed on this item now.. this is supplied outright.
- CAUTION: Avoid striking or damaging the piston in these calipers, as they use screw-type recessing and expanding pistons rather than hydraulic pump-outs. Impacting them can cause serious damage, so handle with care. Each unit is thoroughly inspected before shipment.
Delivery is provided through standard road freight within Australia for orders placed and paid online. Additional charges apply for regional areas in Western Australia and the Northern Territory.
HELP: with rear disc brakes
Incorrectly bled or adjusted rear calipers
Rear calipers that have an internal parking brake with a lever can be troublesome. These calipers must be adjusted so that the piston is moved out and the pads are close to the rotor. If this initial adjustment is not made the pistons will travel outward during activation but no squeezing of the rotor will occur. This can be checked by clamping off the rear hoses and checking if the pedal gets better. Adjust as necessary.
Incorrect Booster Pin Length
The booster pin that pushes on the master cylinder must almost be touching the master cylinder piston face. A gap larger than 1/32" will begin to introduce a spongy pedal. Adjust as necessary.
Incorrect Master Cylinder
If the bore size of the master cylinder is too small for the fluid requirements of the system you will get a very poor pedal. This will happen most frequently with four piston calipers and with four wheel disc brakes. The only solution for this is to install a larger bore master cylinder or a true four wheel disc master
Bleeder Screws MUST always be ON TOP
Doing a brake custom job.. then remember that the bleeder screws on calipers must be at the 12:00 position on the caliper to allow all the air to escape during bleeding.
A very common mistake installers will make is to reverse the side the caliper goes on giving you a situation where the caliper bleeder screw is facing down. It's also common to use the wrong caliper on a bolt on disc kit giving a situation where the bleeder hole is shifted from the 12:00 position producing a pocket of air at the top of the caliper bore which can not be dislodged. Check your bleeder hole orientation.
