TII Rear - NA Rear..
#1
TII Rear - NA Rear..
Does anyone know the ring and pinion ratio on a 90' GTU, and a 87 TII...? Or where I could find that information...?
I'm thinking about swapping out my 90GTU rear end for a 87TII rear that I have laying around.
What are my options here...?
Am I better off swapping out the entire rear...? Doesn't that require using a TII driveshaft and halfshafts...?
Or can I just swap out the guts and use the N/A housing and halfshafts w/the TII insides...?
Thanks...!
I'm thinking about swapping out my 90GTU rear end for a 87TII rear that I have laying around.
What are my options here...?
Am I better off swapping out the entire rear...? Doesn't that require using a TII driveshaft and halfshafts...?
Or can I just swap out the guts and use the N/A housing and halfshafts w/the TII insides...?
Thanks...!
#5
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Memphis....every last one of your posts that I have read, you have given people false and wrong information. If you don't know what you are talking about, please do not respond.
The automatic N/A rear end ratio is 3.909. If they are both 5-speed rear ends , then they both will have a 4.10 ratio. The turbo rear end is not the same as the N/A. It will have an LSD for one, whereas the S5 GTU one will most likely not. But in addion to that, it is not even the same size. You will need the T2 axles, and Im not 100% sure on the driveshaft but I think that will not bolt up either. The internals are also different, the T2 uses an 8" ring and the N/A is 7".
The automatic N/A rear end ratio is 3.909. If they are both 5-speed rear ends , then they both will have a 4.10 ratio. The turbo rear end is not the same as the N/A. It will have an LSD for one, whereas the S5 GTU one will most likely not. But in addion to that, it is not even the same size. You will need the T2 axles, and Im not 100% sure on the driveshaft but I think that will not bolt up either. The internals are also different, the T2 uses an 8" ring and the N/A is 7".
#7
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Re: TII Rear - NA Rear..
Originally posted by 85TIIDEVIL
Does anyone know the ring and pinion ratio on a 90' GTU, and a 87 TII...? Or where I could find that information...?
Does anyone know the ring and pinion ratio on a 90' GTU, and a 87 TII...? Or where I could find that information...?
http://www.iluvmyrx7.com/
http://fc3s.org/
Originally posted by JerryLH3
The pinion flange must be machined so that the N/A driveshaft can bolt up. This is assuming he will still be using the N/A tranny.
The pinion flange must be machined so that the N/A driveshaft can bolt up. This is assuming he will still be using the N/A tranny.
http://www.mazdatrix.com/
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#8
THANKS FOR ALL THE INPUT GUYS. I've been doing my own thinking too while away from the computer...
Ok... My 90GTU "WAS" an automatic. I converted it over to 5speed as soon as I bought it. So I guess this means I have a 3.90ratio according to RXMFN7's reply.
I know the TII rear is LSD, that's my point in wanting to change it, plus now knowing the TII ratio, 4.10's will liven it up some tooo...
1ST: THE DRIVESHAFT: My MAZDA manual calls the piece on the rearend that the driveshaft bolts up to the "Companion Flange". (I see EVILAVIATOR calls it the pinion flange, I'm not that good with the "BOOK" terms.) Couldn't you remove the big bolt in the middle and swap this out between the two rears to accept the N/A driveshaft on the TII rear...?
or... couldn't I bring the driveshaft to a shop that builds custom driveshafts and put the TII driveshaft tail, on the N/A driveshaft..? A custom driveshaft to put a TII tranny in my 1st gen only cost $180 (and that was for a NEW driveshaft from front to back with replacement universal joints.)
2nd: THE HALFSHAFTS: I know they are different, but does it end there...? Will the halfshafts bolt up to the N/A axle hubs..?
Sorry for all the detailed questions... but this is my dailydriver and I need it to get back and forth to work EVERYDAY... So I need to find out as much info as possible before I go attempting to swap out rearends and something doesn't work.
I know there has got to be some TII converts who've done this before with first hand experience.
THANKS.
Ok... My 90GTU "WAS" an automatic. I converted it over to 5speed as soon as I bought it. So I guess this means I have a 3.90ratio according to RXMFN7's reply.
I know the TII rear is LSD, that's my point in wanting to change it, plus now knowing the TII ratio, 4.10's will liven it up some tooo...
1ST: THE DRIVESHAFT: My MAZDA manual calls the piece on the rearend that the driveshaft bolts up to the "Companion Flange". (I see EVILAVIATOR calls it the pinion flange, I'm not that good with the "BOOK" terms.) Couldn't you remove the big bolt in the middle and swap this out between the two rears to accept the N/A driveshaft on the TII rear...?
or... couldn't I bring the driveshaft to a shop that builds custom driveshafts and put the TII driveshaft tail, on the N/A driveshaft..? A custom driveshaft to put a TII tranny in my 1st gen only cost $180 (and that was for a NEW driveshaft from front to back with replacement universal joints.)
2nd: THE HALFSHAFTS: I know they are different, but does it end there...? Will the halfshafts bolt up to the N/A axle hubs..?
Sorry for all the detailed questions... but this is my dailydriver and I need it to get back and forth to work EVERYDAY... So I need to find out as much info as possible before I go attempting to swap out rearends and something doesn't work.
I know there has got to be some TII converts who've done this before with first hand experience.
THANKS.
Last edited by 85TIIDEVIL; 07-10-03 at 11:36 PM.
#10
Axles, halfshafts... whatever you want to call em'. The question I was trying to reask was... Are the TII's axles or halfshafts a bolt up to the N/A wheel assembly...?
Again... Anyone know about removing the pinion flanges to swap out between the two rears to accept the N/A driveshaft on the TII rear...?
Again... Anyone know about removing the pinion flanges to swap out between the two rears to accept the N/A driveshaft on the TII rear...?
#11
Former Moderator. RIP Icemark.
Length wise, in therory the N/A half shafts should bolt on, however, they may need to be compressed completely, which may or may not be an issue (if they can actually compress that far).
#12
Information Regurgitator
I think n?as and TII use the same hubs so the halfshafts should fit fine.As for changing the pinion flange I don't think I would try it as I think it requires diassembly of the differentail housing.
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Originally posted by 85TIIDEVIL
couldn't I bring the driveshaft to a shop that builds custom driveshafts and put the TII driveshaft tail, on the N/A driveshaft..? A custom driveshaft to put a TII tranny in my 1st gen only cost $180 (and that was for a NEW driveshaft from front to back with replacement universal joints.
couldn't I bring the driveshaft to a shop that builds custom driveshafts and put the TII driveshaft tail, on the N/A driveshaft..? A custom driveshaft to put a TII tranny in my 1st gen only cost $180 (and that was for a NEW driveshaft from front to back with replacement universal joints.
I don't understand why you are making so much trouble out of the issue. You can get a non-turbo 4.10 or 4.30 LSD as a direct replacement for your 2.909 rear end.
More info:
http://www.mazdatrix.com/g5.htm
#14
It's not trouble at all. I have a 87TII rearend minus the halfshafts left over from the doner car I used to convert my 1st gen to T. It's sitting in my garage collecting dust... And it's FREE... Soooooo I'd like to change it. I'm asking how to do it in hopes of before I get under the car, remove a rear and attempt to put in the next, I already have an idea of what problems I'm going to run into so my car isn't on jackstands for a week.
Last edited by 85TIIDEVIL; 07-12-03 at 08:52 AM.
#18
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Originally posted by Rxmfn7
Memphis....every last one of your posts that I have read, you have given people false and wrong information. If you don't know what you are talking about, please do not respond.
Memphis....every last one of your posts that I have read, you have given people false and wrong information. If you don't know what you are talking about, please do not respond.
I don't mean to be a jerk or anything, but I have to agree with this.
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