2nd gen tranny in 1st gen ?????
03-28-07, 11:39 PM
#1
fasterthanaspeedingticket
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2nd gen tranny in 1st gen ?????
im swapping a 2nd gen tranny into my 1st gen later this week and just need to get some things straight.
1st all i have to do is swap tailshafts and bolt in correct?
2nd can i use the 2nd gens clutch disc and preasure plate?
3rd what do i need to know about pulling the flywheel for resurfacing?
4th what fluid is recomended?
1st all i have to do is swap tailshafts and bolt in correct?
2nd can i use the 2nd gens clutch disc and preasure plate?
3rd what do i need to know about pulling the flywheel for resurfacing?
4th what fluid is recomended?
03-28-07, 11:57 PM
#2
Savanna Rx-7
Originally Posted by 85rx12a
im swapping a 2nd gen tranny into my 1st gen later this week and just need to get some things straight.
1st all i have to do is swap tailshafts and bolt in correct?
2nd can i use the 2nd gens clutch disc and preasure plate?
3rd what do i need to know about pulling the flywheel for resurfacing?
4th what fluid is recomended?
1st all i have to do is swap tailshafts and bolt in correct?
2nd can i use the 2nd gens clutch disc and preasure plate?
3rd what do i need to know about pulling the flywheel for resurfacing?
4th what fluid is recomended?
2: yes kind of
3: one quesiton at a time
4: see #3
1: a) you need to get a custom driveshaft made, b) you need to fab up a transmission mount c) you need to either modify the shifter location (archives) or modify the shifter (archives)
2: you must use a lightened 13b fylwheel with the 12A auto tranny counter weight then you can use the 2nd gen pressure plate, throw out starter etc.
3: no ofence but if you cannot read a general service manual Hayens etc, then you should not be attempting this
4: depends upon expected useage...street driving with occasionl stupidity = stock 70~90 weight gear oil.
kenn
03-28-07, 11:59 PM
#3
Originally Posted by 85rx12a
im swapping a 2nd gen tranny into my 1st gen later this week and just need to get some things straight.
1st all i have to do is swap tailshafts and bolt in correct?
2nd can i use the 2nd gens clutch disc and preasure plate?
3rd what do i need to know about pulling the flywheel for resurfacing?
4th what fluid is recomended?
1st all i have to do is swap tailshafts and bolt in correct?
2nd can i use the 2nd gens clutch disc and preasure plate?
3rd what do i need to know about pulling the flywheel for resurfacing?
4th what fluid is recomended?
#2). Only if yours is the 225mm clutch in yours now.
#3). Undo flywheel nut and leave on with a few threads and either tap on it with a hammer from the front side of the flywheel
Or you can take to prybars and wiggle it off.
#4). I use synthetic. Any brand is fine.
I have a thread in the archives that will help you in holding the flywheel and also a tip for reinstallation of the trans in the same thread.
03-29-07, 12:00 AM
#4
Savanna Rx-7
almost forgot this one
SEARCH!
sorry dude, this is all easily found in the archives, or by useing search.....its covered at least 1st a week sometimes twice.
Now I was nice enough to answer before I screamed, so you need to be nice enough to search next time.
kenn
sorry dude, this is all easily found in the archives, or by useing search.....its covered at least 1st a week sometimes twice.
Now I was nice enough to answer before I screamed, so you need to be nice enough to search next time.
kenn
03-29-07, 12:05 AM
#5
Originally Posted by kenn_chan
1: no
2: yes kind of
3: one quesiton at a time
4: see #3
1: a) you need to get a custom driveshaft made, b) you need to fab up a transmission mount c) you need to either modify the shifter location (archives) or modify the shifter (archives)
2: you must use a lightened 13b fylwheel with the 12A auto tranny counter weight then you can use the 2nd gen pressure plate, throw out starter etc.
3: no ofence but if you cannot read a general service manual Hayens etc, then you should not be attempting this
4: depends upon expected useage...street driving with occasionl stupidity = stock 70~90 weight gear oil.
kenn
2: yes kind of
3: one quesiton at a time
4: see #3
1: a) you need to get a custom driveshaft made, b) you need to fab up a transmission mount c) you need to either modify the shifter location (archives) or modify the shifter (archives)
2: you must use a lightened 13b fylwheel with the 12A auto tranny counter weight then you can use the 2nd gen pressure plate, throw out starter etc.
3: no ofence but if you cannot read a general service manual Hayens etc, then you should not be attempting this
4: depends upon expected useage...street driving with occasionl stupidity = stock 70~90 weight gear oil.
kenn
Your #1). Wrong/wrong/wrong/ You use the stock driveshaft.
You use the stock trans mount.
The shifter will be in the same location
Your #2). The 2nd gen clutch will fit perfectly.Throw out bearing is the same, starter does not get changed.
Flywheel does not get changed.
This all aplies to a non-turbo 2nd gen N/A trans from 86-88. The later ones as far as the transmission is different from 89-91N/A
And of course all are different on the turbo models.
03-29-07, 12:20 AM
#7
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i was putting a 2nd tranny (T2) on mines but till i relized all the other parts that were needed it's actually easy. but i was under budget so i got a 12A TURBO faster gear ratios...
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03-29-07, 02:25 AM
#11
I concur with '84 stock. The tranny length from input shaft to output shaft is the same from '74 to '92 NA. Same splines.
A simple swap of the tailhousing is necessary because the shifter housing position and shift rod length is a little further rearward on the FC. There is no easy way to move it the required few cm forward to make it fit comfortably in an FB. You're better off swapping in the FB tailhousing with shifter and rod assembly.
A simple swap of the tailhousing is necessary because the shifter housing position and shift rod length is a little further rearward on the FC. There is no easy way to move it the required few cm forward to make it fit comfortably in an FB. You're better off swapping in the FB tailhousing with shifter and rod assembly.
03-29-07, 09:30 AM
#13
Originally Posted by Jeff20B
I concur with '84 stock. The tranny length from input shaft to output shaft is the same from '74 to '92 NA. Same splines.
A simple swap of the tailhousing is necessary because the shifter housing position and shift rod length is a little further rearward on the FC. There is no easy way to move it the required few cm forward to make it fit comfortably in an FB. You're better off swapping in the FB tailhousing with shifter and rod assembly.
A simple swap of the tailhousing is necessary because the shifter housing position and shift rod length is a little further rearward on the FC. There is no easy way to move it the required few cm forward to make it fit comfortably in an FB. You're better off swapping in the FB tailhousing with shifter and rod assembly.
You only swap the housing. The shifter and rod assemblies do not need to be changed from the 1st gen to the 2nd gen N/A S4 trans.
The only reason for the tailshaft housing swap is so you can use the FB transmount and crossmember.
03-29-07, 09:37 AM
#14
13b P-port on a budget
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i am shocked at all the conflicting information in this tread its really going no where. I believe doc is correct just the rear tail shft needs to be swaped. My question to throw more confusion. The TII tranny can you do the same thing? Swap out the tail shaft and bellhousing "If you wanna keeep the starter, clutch and flywheel you cutently have on your car?
03-29-07, 09:41 AM
#15
Nick, no. The internals and even the spline count is different on the TII trans.
So if anyone asks. Yes, I am correct on the information. I have done this swap many times over. (Refeering to the S4 N/A trans into a FB).
So if anyone asks. Yes, I am correct on the information. I have done this swap many times over. (Refeering to the S4 N/A trans into a FB).
Last edited by Rx-7Doctor; 03-29-07 at 12:56 PM.
03-29-07, 02:32 PM
#17
Originally Posted by bliffle
I just put an SE trans in my 83GS 12A and got a drop of rpm in 5th gear, which is what I wanted. Why would an FC trans be better?
03-29-07, 03:42 PM
#18
Unless you're running tall gears (R&P), swapping 2nd gen tranny over 1st gen is a waste of time. This applies to good 1st gen tranny.
Secondly, you wont notice any improvement (ie gas mileage) provided that you have ported motor and tall gear like myself.
Secondly, you wont notice any improvement (ie gas mileage) provided that you have ported motor and tall gear like myself.
03-29-07, 03:43 PM
#19
fasterthanaspeedingticket
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so i can swap my 86-87 n/a trans into my 85 gs, correct? cause im damn confused.
swap the tail sections and bolt in right?
as for the clutch, the 86-87 has a four puck clutch. not sure the brand, but it came from RP
and i did search the archives before asking...
swap the tail sections and bolt in right?
as for the clutch, the 86-87 has a four puck clutch. not sure the brand, but it came from RP
and i did search the archives before asking...
03-29-07, 03:49 PM
#20
I heard but I havent tried since I have multiple pre-86 trannies. However, shortening the remote shifter will work.
I have tried to swap the FB tailshaft to a S5 tranny. However, it didnt work as the FB tailshaft housing wont slide over the S5's rear counterweight.
I have tried to swap the FB tailshaft to a S5 tranny. However, it didnt work as the FB tailshaft housing wont slide over the S5's rear counterweight.
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