n/a = S or S = S2 ?
#1
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I always thought the S had a stronger transmission then the n/a. I thought the S had an S2 transmission?!
My mechanic today told me that it wans't the case. I am confused now. Can anyone shed some light on that?
My ring and pinion let go... this sucks.
My mechanic today told me that it wans't the case. I am confused now. Can anyone shed some light on that?
My ring and pinion let go... this sucks.
#2
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S = S
From the 944 FAQ
http://www.connact.com/~kgross/FAQ/944faq.html
"The S also received an updated transmission that featured a larger, meatier pinion gear, the Achilles' heal of its eight-valve older brothers. It had the same gearing as the 944 Turbo, but a shorter final ratio like the eight-valve, aspiros."
From the 944 FAQ
http://www.connact.com/~kgross/FAQ/944faq.html
"The S also received an updated transmission that featured a larger, meatier pinion gear, the Achilles' heal of its eight-valve older brothers. It had the same gearing as the 944 Turbo, but a shorter final ratio like the eight-valve, aspiros."
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I'd guess an N/A tranny would hold up just fine if you're not planning on doing anything really stupid with it. S2 transmission would work also, 5th gear would be a bit taller than what you had but no big deal. With a 951 tranny you would probably notice a decrease in acceleration.
Danno has all the gear ratios listed on his web page:
http://members.rennlist.com/951_racerx/
Danno has all the gear ratios listed on his web page:
http://members.rennlist.com/951_racerx/
#7
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The S, S2, and Turbo have basically the same gear box and gears. The ring/pinion ratios are different:
S 3.889
S2 3.875
Turbo 3.3...something(.375?), I just drew a blank
The individual gears sets are all the same except for the S2 has a taller 5th gear set.
I wouldnt put an S2 or especially a Turbo trans in an S, you would notice the taller gearing (less acceleration).
I thought about using a plain 944 trans with a 924S 5th gear set for a track only 944S, but wouldnt recommend that for the street, unless you wouldnt mind the higher rpms at cruising speeds.
S 3.889
S2 3.875
Turbo 3.3...something(.375?), I just drew a blank
The individual gears sets are all the same except for the S2 has a taller 5th gear set.
I wouldnt put an S2 or especially a Turbo trans in an S, you would notice the taller gearing (less acceleration).
I thought about using a plain 944 trans with a 924S 5th gear set for a track only 944S, but wouldnt recommend that for the street, unless you wouldnt mind the higher rpms at cruising speeds.
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#8
Three Wheelin'
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According to the Porsche Factory Manual, the 944S got the Type 083D transmission, which is identical to the 951 Type 016R transmission except for:
- no transmission oil pump available;
- final drive increased to 9:35;
- transmission casing with machined recess for ring gear;
- design distance "Ro" 58.15 mm.
The 944S2 got the Type 083F transmission, which is "the same in design and repairing procedures as the 944 S transmission 083D, except for a few deviations:
- longer 5th gear 36:28 i = 0.778
- final drive ratio 8:31 i = 3.875
- design distance "Ro" 59.65 mm
- stronger differential" (italics added by me.)
The factory seems to believe the 944S2 differential is stronger than the 944 / 944S differential. They replaced the R&P gears with physically smaller gears, while trying to keep the same final drive ratio (3.875 versus 3.889). I am not sure if machining the casing factors into the strength or not. HTH![bigbye](https://rennlist.com/forums/graemlins/xyxwave.gif)
EDIT: Both the 951 and 951S use 8:27 (i = 3.375) R&P gear, which is the same 8 tooth pinion gear. No strength issues. The 944S uses the same 9:35 R&P gears from the 944, so I think the FAQ is wrong on this issue. The real question might be if you can use the S2 R&P gears when rebuilding your S tranny.
- no transmission oil pump available;
- final drive increased to 9:35;
- transmission casing with machined recess for ring gear;
- design distance "Ro" 58.15 mm.
The 944S2 got the Type 083F transmission, which is "the same in design and repairing procedures as the 944 S transmission 083D, except for a few deviations:
- longer 5th gear 36:28 i = 0.778
- final drive ratio 8:31 i = 3.875
- design distance "Ro" 59.65 mm
- stronger differential" (italics added by me.)
The factory seems to believe the 944S2 differential is stronger than the 944 / 944S differential. They replaced the R&P gears with physically smaller gears, while trying to keep the same final drive ratio (3.875 versus 3.889). I am not sure if machining the casing factors into the strength or not. HTH
![bigbye](https://rennlist.com/forums/graemlins/xyxwave.gif)
EDIT: Both the 951 and 951S use 8:27 (i = 3.375) R&P gear, which is the same 8 tooth pinion gear. No strength issues. The 944S uses the same 9:35 R&P gears from the 944, so I think the FAQ is wrong on this issue. The real question might be if you can use the S2 R&P gears when rebuilding your S tranny.