SC vs NA tranny differences?

skeksis · 05-07-2007, 01:18 PM

so I recently bought an '87 NA... the guy I bought it from had the tranny replaced less than a year ago, and he's reasonably confident that the replacement came out of an SC parts car. wouldn't surprise me whatsoever if the guy was wrong, but that's what he says. my question is whether or not there are any differences in the gearboxes. seems like I might have read somewhere that the SC is geared longer, might actually improve gas mileage at freeway speeds. anyway, just curious if anyone knows the truth on this.

seven_mgte · 05-07-2007, 04:30 PM

you cant just swap to an SC tranny by itself. you need new shifter cables, axles, clutch, and I think one of the tranny mounts need to be changed (might be wrong on that one tho.) So chances are its not an sc trans.

Easy way to check, look at the axles, it's an NA trans if they look like this:

its an SC trans if they look like this:

the transmission ends have obviously different flanges and the NA ones are thinner.

skeksis · 05-07-2007, 06:37 PM

yeah, I've got the NA-type axles.... so that's settled. one other related question: is there any (easy) way to tell the difference between the earlier C-50 vs the later C-52?

seven_mgte · 05-08-2007, 12:46 AM

sorry, I can't help you there.

CpuZapper · 05-13-2007, 04:34 PM

The C-52 will have humps for the starter on both the exhaust, and intake side of the motor. The C-50 only has it on the exhaust side.

05-07-2007, 01:18 PM	#1 (permalink)
skeksis No Skills Join Date: May 2007 Location: Phx, AZ Posts: 33 Thanks: 0 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	SC vs NA tranny differences? so I recently bought an '87 NA... the guy I bought it from had the tranny replaced less than a year ago, and he's reasonably confident that the replacement came out of an SC parts car. wouldn't surprise me whatsoever if the guy was wrong, but that's what he says. my question is whether or not there are any differences in the gearboxes. seems like I might have read somewhere that the SC is geared longer, might actually improve gas mileage at freeway speeds. anyway, just curious if anyone knows the truth on this.

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05-07-2007, 04:30 PM	#2 (permalink)
seven_mgte Cage Fighter Join Date: Aug 2005 Location: Coquitlam, BC.ca Posts: 327 Thanks: 0 Thanked 7 Times in 7 Posts My Google Map iTrader Rating: (0/0% )	you cant just swap to an SC tranny by itself. you need new shifter cables, axles, clutch, and I think one of the tranny mounts need to be changed (might be wrong on that one tho.) So chances are its not an sc trans. Easy way to check, look at the axles, it's an NA trans if they look like this: its an SC trans if they look like this: the transmission ends have obviously different flanges and the NA ones are thinner.

05-07-2007, 06:37 PM	#3 (permalink)
skeksis No Skills Join Date: May 2007 Location: Phx, AZ Posts: 33 Thanks: 0 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	yeah, I've got the NA-type axles.... so that's settled. one other related question: is there any (easy) way to tell the difference between the earlier C-50 vs the later C-52?

05-08-2007, 12:46 AM	#4 (permalink)
seven_mgte Cage Fighter Join Date: Aug 2005 Location: Coquitlam, BC.ca Posts: 327 Thanks: 0 Thanked 7 Times in 7 Posts My Google Map iTrader Rating: (0/0% )	sorry, I can't help you there.

05-13-2007, 04:34 PM	#5 (permalink)
CpuZapper RallyRacer Join Date: Mar 2005 Location: Portland, OR Posts: 480 Thanks: 7 Thanked 25 Times in 22 Posts My Google Map iTrader Rating: (1/100% )	The C-52 will have humps for the starter on both the exhaust, and intake side of the motor. The C-50 only has it on the exhaust side.