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Any update on the 4L80e cantilever adapter for the T56 crossmember?
You can purchase/use the 4L80 adapter we sell for the Hooker G-body crossmember as long as you are willing/capably of drilling a couple of extra holes in your Hooker 2nd-gen T56 crossmember. We will eventually revise the crossmember to include the extra holes, but it will take a little time to get it done.
So……… did you update all the crossmenbers you have on the shelf yet? LOL.
Sure, I drilled them all myself at lunchtime and put them back on the shelf! Just a joke obviously; existing product typically does not get re-worked to expand application coverage. Such changes are made at the engineering level as design revisions on the drawings and are put into affect in subsequent production runs. I do this type of design change as a side project if it's something management warrants as being worthwhile. If not, I keep cranking on the next LS swap system application.
When using the complete hooker mounts in a 70 gen2 Camaro with a T56. What does the driveshaft length need to be ?
Thanks in advance Bob
As there are different rear axle/suspension set-ups that are popularly used in 2nd-gens there isn't a universal length of driveshaft that will work with all of them. You need to take measurements after your swap and work with a reputable driveshaft shop to get an appropriate length shaft made. Most of the shops out there are very helpful with explaining the process to you over the phone.
Stock low-mount A/C compressors are not compatible with these mounts. The compressor must be upper-mounted to the right
cylinder head with the use of a Holley® 20-133 (GM R4), 20-134 (Sanden SD508 or SD7), or similar bracket assembly.
I am doing an LS1 with 4L60E swap in my 1981 Pontiac Trans am. Other than the motor mounts for 75-81, trans crossmember and 2292 clamshell and headers and exhaust what else do I need to make my swap go in? part numbers would be great so I can order ASAP.
I am doing an LS1 with 4L60E swap in my 1981 Pontiac Trans am. Other than the motor mounts for 75-81, trans crossmember and 2292 clamshell and headers and exhaust what else do I need to make my swap go in? part numbers would be great so I can order ASAP.
It goes between the transmission isolator mount and transmission case when using one of the Hooker crossmembers and compensates for the differences between the early 2nd-gen subframes and the later ones.
just a quick question, I may have missed it but which subframe does the steel spacer included with the mounts go to? Does this go on a pre-75 subframe or a 75-81?
Last edited by 1976CamaroGuy; 12-02-2015 at 01:16 PM.
I also wanted to point out, it would be nice to either have had the mounts stamped "passenger" and "drivers" side so the orientation isn't confusing.
I looked all over my mounts for a drivers or passenger side indication and grabbed the instructions and went over them several times and couldn't find anything.
I took a guess as to what looks "right" and ended up putting them in backwards, a few hours later I found this thread after scratching my head as to what was wrong. Could have saved the headache if the parts were marked or at least had something in the instructions that the "shorter one" was "X" side of the motor.
It was a pain in the *** getting them in a cramped bay by themselves, but having to do it twice really sucked. Just a heads up
just a quick question, I may have missed it but which subframe does the steel spacer included with the mounts go to? Does this go on a pre-75 subframe or a 75-81?
Never got a reply here. but Holley replied to my email to tech. I'll post it here so it can helps others. There really needs to be a section on those instructions covering this spacer and what side each mount goes on
Thanks for contacting Holley Performance Products. That 2 hole spacer is for use with the 12616HKR crossmember and a T56 transmission.If you are installing a T56 Magnum, the included two-hole spacer is to be installed between the crossmember and the isolator to compensate for the isolator mounting surface of the T56 Magnum being closer to the transmission output shaft centerline than the
same surface on an LS F-Body/GTO T56.Leaving this spacer out will increase the engine inclination angle beyond that intended by Hooker and decrease the ground clearance of Hooker headers designed for this application.
Never got a reply here. but Holley replied to my email to tech. I'll post it here so it can helps others. There really needs to be a section on those instructions covering this spacer and what side each mount goes on
Is the spacer you are referring to the same as the one I posted a pic of in post 131 of this thread?
It is a bit tough to get some answer sometimes...they couldn't answer me when I called and took my number saying they'd call back the next day. It took another 2 days before they finally called back.
On another note...I have been chasing some issues related to an exhaust leak and came to find out that both of my headers had holes in them at the collectors...not sure if it'll show in the pic...
On one side it was affecting the readings by the O2 sensor...huge pain to find the problem.
It is a bit tough to get some answer sometimes...they couldn't answer me when I called and took my number saying they'd call back the next day. It took another 2 days before they finally called back.
On another note...I have been chasing some issues related to an exhaust leak and came to find out that both of my headers had holes in them at the collectors...not sure if it'll show in the pic...
On one side it was affecting the readings by the O2 sensor...huge pain to find the problem.
Which headers are those? That tiny little hole will cause all kinds of issues with O2 sensors!!!
You'll get false lean readings, which might explain all the carbon build up on the inside of your headers.
03-30-2015, 09:21 AM
