S4 Trans Swap into SA clarification
#1
S4 Trans Swap into SA clarification
Doing some searching and found a lot of threads on swapping TII trans into FB's, NA trans into FB's, etc. But not finding much of anything on swapping into a SA.
From what I have read in:
https://www.rx7club.com/1st-generati...on-fb-1012259/
All NA rotary transmissions are swappable.
Would I be able to get a FB/FC NA transmission, and swap the rear tail housing so I can retain the SA shifter location and mounts? How about the shifter rods?
Would the stock SA driveshaft still bolt up?
I know if I swap a FC trans in, I would have to swap the speedo gear to the original speedo gear.
From what I have read in:
https://www.rx7club.com/1st-generati...on-fb-1012259/
All NA rotary transmissions are swappable.
Would I be able to get a FB/FC NA transmission, and swap the rear tail housing so I can retain the SA shifter location and mounts? How about the shifter rods?
Would the stock SA driveshaft still bolt up?
I know if I swap a FC trans in, I would have to swap the speedo gear to the original speedo gear.
Last edited by Jeezus; 02-13-17 at 09:15 PM.
#2
Old [Sch|F]ool
There are two different SA transmissions. You need to start with the one manufactured after March 1980, as that is the one that uses rollpins to hold the shift fingers to the rods.
When you swap tailhousing between SA and FB, the shift fingers need to change over as well since they are all different.
When you swap tailhousing between SA and FB, the shift fingers need to change over as well since they are all different.
#4
There are two different SA transmissions. You need to start with the one manufactured after March 1980, as that is the one that uses rollpins to hold the shift fingers to the rods.
When you swap tailhousing between SA and FB, the shift fingers need to change over as well since they are all different.
When you swap tailhousing between SA and FB, the shift fingers need to change over as well since they are all different.
#6
RX7GARAGE
I have a 79' as well but with a four speed manual. I'd like to put a five speed in but I'm thinking to find one off a FB or maybe FC instead of putting a SA five speed in. I'm just not sure what route to take?
#7
Happy Rotoring!
iTrader: (13)
Installing an FB transmission in a SA can be accomplished, but the location of the shift lever is a few inches or so different. In short, it causes problems with the interior center console / shift surround. These pieces do not just bolt up and interchange btw SA and FB's and you will end up doing some custom fabrication on the interior.
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#8
Waffles - hmmm good
iTrader: (1)
Heres some helpful links Stu, looks like that 79 tranny tail can't be swapped but who knows.
https://www.rx7club.com/1st-generati...moval-1070940/
1980 RX-7 Transmission Swap [Archive] - Improved Touring Racing Forums
https://www.rx7club.com/1st-generati...ans-sa-612876/
https://www.rx7club.com/1st-generati...stion-1039998/
https://www.rx7club.com/1st-generati...moval-1070940/
1980 RX-7 Transmission Swap [Archive] - Improved Touring Racing Forums
https://www.rx7club.com/1st-generati...ans-sa-612876/
https://www.rx7club.com/1st-generati...stion-1039998/
#9
RX7GARAGE
btw, will late 80' sa tranny's fit a 79? Cause I thought I read something different on a late model SA as far as the transmission. Don't want to do any mods so just want to make sure if I come across a late sa tranny I don't run into problems. Thanks!
#11
Old [Sch|F]ool
Yes, BTDT.
Actually it's kind of funny. I had a FB with a trans that was HOWLING (the vent was plugged, so when it got hot it blew all the fluid out, which the bearings do not appreciate) and I had my SA trans from my dead '80, I swapped the FB tailhousing onto the SA trans and kept truckin'. Later a friend bought a four speed '79 and we converted it to 5-speed with an FB trans that we put my SA tailhousing on.
Actually it's kind of funny. I had a FB with a trans that was HOWLING (the vent was plugged, so when it got hot it blew all the fluid out, which the bearings do not appreciate) and I had my SA trans from my dead '80, I swapped the FB tailhousing onto the SA trans and kept truckin'. Later a friend bought a four speed '79 and we converted it to 5-speed with an FB trans that we put my SA tailhousing on.
#13
Old [Sch|F]ool
You can't "shorten" it, the shifter position is a lot lower in the trans too. That is why the shift fingers need to be addressed, the main shift rod is in a completely different location.
#19
How did you go about shortening it?
I believe I saw a thread with a video, guy cut the "shifter housing" (unsure of the correct term) up, I believe something like 50mm or so? Ended up with 2 bolts instead of 4 to hold it down. Kind of what I think you did on the 3rd pic you posted?
I believe I saw a thread with a video, guy cut the "shifter housing" (unsure of the correct term) up, I believe something like 50mm or so? Ended up with 2 bolts instead of 4 to hold it down. Kind of what I think you did on the 3rd pic you posted?
#20
RX for fun
iTrader: (13)
How did you go about shortening it?
I believe I saw a thread with a video, guy cut the "shifter housing" (unsure of the correct term) up, I believe something like 50mm or so? Ended up with 2 bolts instead of 4 to hold it down. Kind of what I think you did on the 3rd pic you posted?
I believe I saw a thread with a video, guy cut the "shifter housing" (unsure of the correct term) up, I believe something like 50mm or so? Ended up with 2 bolts instead of 4 to hold it down. Kind of what I think you did on the 3rd pic you posted?
yes there are several DIY threads in the old school section. thats how i did my gslse. for the rx3, turbodave shortened my S5 tranny 6.125" sunce the shifter is further back and it requires welding mounting ears on the side of the S5 shifter housing. you need to be careful when drilling/tap new hole for shifter cup. it need to line up with the orig hole. otherwise you wont be able to shift as it will jamb like my first attempt