4+3 trans swaps
Racer
Joined: Jan 2004
Posts: 428
Likes: 2
From: Everfrost Second Life
There is no float in this application, and unlike the Camaro it must be locked solid. I'm am not saying it won't work, but its just a point to consider.
Last edited by 5speeds; Jan 18, 2008 at 01:15 PM.
Burning Brakes
Joined: Jun 2005
Posts: 1,191
Likes: 15
From: Wallingford Vermont
Interesting point Paul (5Speeds). I'm glad that you added to this thread.
I wonder if a strut rod(s) would be of any benifit? (Similar to struts found on 4WD transfer case to transmission assemblies). 'Not sure where to mount them though, where it would actually help take some of the torsional stress.
I wonder if a strut rod(s) would be of any benifit? (Similar to struts found on 4WD transfer case to transmission assemblies). 'Not sure where to mount them though, where it would actually help take some of the torsional stress.
Racer
Joined: Jan 2004
Posts: 428
Likes: 2
From: Everfrost Second Life
Years ago on the S-10 T5's there was a lower fin on the tail that reinforcement straps bolted to that "V"'d out into the bell. The idea was to keep the assembly from twisting. Something like this may help, but the cracking problem existed on the factory 4+3 anyway. People always thought it was just a bolt leaking on the bottom of the case mid section, but actually the case would crack at that point and oil would like around the gasket and out of the crack.
Any one who has a gear lube leak at where the OD unit meets the adapter basically has a cracked section.
Any one who has a gear lube leak at where the OD unit meets the adapter basically has a cracked section.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Years ago on the S-10 T5's there was a lower fin on the tail that reinforcement straps bolted to that "V"'d out into the bell. The idea was to keep the assembly from twisting. Something like this may help, but the cracking problem existed on the factory 4+3 anyway. People always thought it was just a bolt leaking on the bottom of the case mid section, but actually the case would crack at that point and oil would like around the gasket and out of the crack.
Any one who has a gear lube leak at where the OD unit meets the adapter basically has a cracked section.
Any one who has a gear lube leak at where the OD unit meets the adapter basically has a cracked section.
Racer
Joined: Jan 2004
Posts: 428
Likes: 2
From: Everfrost Second Life
Tak some brake cleaner and clean up the mid section casting. Its usually dead enter on the bottom. The casting is thin there and cracks from flex..
The fix is simple actually. When I use to rebuild those units, there are 2 12 point bolts that fasten the adapter housing to the 4 speed ( inside). The gasket basically seals the upper portion of the lower hole, but doesn't surround the complete bolt hole. So when it cracks the oil goes into the hole and out the bottom.
What I did was after every 4 speed rebuild was fill the hole with epoxy BEFORE bolting on the OD, so in the event it ever did crack the oil could never leak out.
You would need to pull the trans, remove the OD and seal the hole and of course use a new gasket.
The fix is simple actually. When I use to rebuild those units, there are 2 12 point bolts that fasten the adapter housing to the 4 speed ( inside). The gasket basically seals the upper portion of the lower hole, but doesn't surround the complete bolt hole. So when it cracks the oil goes into the hole and out the bottom.
What I did was after every 4 speed rebuild was fill the hole with epoxy BEFORE bolting on the OD, so in the event it ever did crack the oil could never leak out.
You would need to pull the trans, remove the OD and seal the hole and of course use a new gasket.
Intermediate
Joined: Feb 2007
Posts: 41
Likes: 0
With a little imagination, you can do just about anything.
I ended up installing a Jerico 4-sp box (race prepped T-10 top loader) in my C4.
It weighs just over 60#. It has straight cut gears for clutchless shifting. You can stack your gears in multiple ratio's. Good to 800 ft/lbs torque.
I ended up installing a Jerico 4-sp box (race prepped T-10 top loader) in my C4.
It weighs just over 60#. It has straight cut gears for clutchless shifting. You can stack your gears in multiple ratio's. Good to 800 ft/lbs torque.
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Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
I thought it was a little high, until I got the ZF6. Seems as if GM designed these to shift like dump trucks.
-- Joe
Burning Brakes
Joined: Sep 2006
Posts: 1,202
Likes: 3
From: MD
Nah, I haven't finished cutting the side out of the console yet (the part still attached to the car, not the shifter cover part). I'm gonna snap pics of the shifter and the patching when I get back on track so you can add pics of a 4+3 tunnel to your writeup. It's different than the auto tunnel.
The dealer is supposedly getting me the T5 part I lost, but it won't be here til late this week (which means probably next week). Ah, well, that'll teach me. You might wanna add a pic of the oiler thingy to your writeup and tell people to make sure they look after it
Hey Joe, been meaning to ask, I picked up a "Spectre" rubber boot (cheap chinese copy of a hurst boot). The large one. The trans sits off to one side of the hole I've made in the tunnel. I should center the boot over where the stick actually sits when in neutral, not over the center of the trans, right? Otherwise the boot will always be cocked way to the left and might make the sifter hard to hit 1st in.
Still gotta find me a 'Stang lever and ball. No junkyards around here got one. What year/model am I looking for?
The dealer is supposedly getting me the T5 part I lost, but it won't be here til late this week (which means probably next week). Ah, well, that'll teach me. You might wanna add a pic of the oiler thingy to your writeup and tell people to make sure they look after it
Hey Joe, been meaning to ask, I picked up a "Spectre" rubber boot (cheap chinese copy of a hurst boot). The large one. The trans sits off to one side of the hole I've made in the tunnel. I should center the boot over where the stick actually sits when in neutral, not over the center of the trans, right? Otherwise the boot will always be cocked way to the left and might make the sifter hard to hit 1st in.
Still gotta find me a 'Stang lever and ball. No junkyards around here got one. What year/model am I looking for?
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Nah, I haven't finished cutting the side out of the console yet (the part still attached to the car, not the shifter cover part). I'm gonna snap pics of the shifter and the patching when I get back on track so you can add pics of a 4+3 tunnel to your writeup. It's different than the auto tunnel.
The dealer is supposedly getting me the T5 part I lost, but it won't be here til late this week (which means probably next week). Ah, well, that'll teach me. You might wanna add a pic of the oiler thingy to your writeup and tell people to make sure they look after it
Hey Joe, been meaning to ask, I picked up a "Spectre" rubber boot (cheap chinese copy of a hurst boot). The large one. The trans sits off to one side of the hole I've made in the tunnel. I should center the boot over where the stick actually sits when in neutral, not over the center of the trans, right? Otherwise the boot will always be cocked way to the left and might make the sifter hard to hit 1st in.
Still gotta find me a 'Stang lever and ball. No junkyards around here got one. What year/model am I looking for?
The dealer is supposedly getting me the T5 part I lost, but it won't be here til late this week (which means probably next week). Ah, well, that'll teach me. You might wanna add a pic of the oiler thingy to your writeup and tell people to make sure they look after it
Hey Joe, been meaning to ask, I picked up a "Spectre" rubber boot (cheap chinese copy of a hurst boot). The large one. The trans sits off to one side of the hole I've made in the tunnel. I should center the boot over where the stick actually sits when in neutral, not over the center of the trans, right? Otherwise the boot will always be cocked way to the left and might make the sifter hard to hit 1st in.
Still gotta find me a 'Stang lever and ball. No junkyards around here got one. What year/model am I looking for?
Pix will be nice. I get emails all the time about this swap. It's becoming popular.
-- Joe
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Racer
Joined: Jan 2004
Posts: 428
Likes: 2
From: Everfrost Second Life
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
