7 and 1/4" gear ratio?

318scamp · 04-15-2007, 09:28 PM

I have a 1972 Scamp with a decently built 318 and I was wondering if anybody knows what gears came in the 7 and 1/4" rear end. i ran the numbers a long time ago and all i found out is that it is a 7 not an 8 and 1/4. im gettin the car dynod on wednesday.

cudakid69 · 04-27-2007, 04:05 PM

I'm not possitive on this, seeing as I don't know scamps that well, but maybe 2.94 or 3.23?

steve74swinger · 12-23-2007, 06:17 PM

Hey 318 scamp my 74 swinger has 2.72 in the rear end. there is a tad on one of the cover bolt if you can look...the tag will have the ratio on it...well if it is still there

440roadrunner · 12-24-2007, 08:08 AM

Geez, just jack up the car!!

I doubt this has a posi, so you'll only need one tire up. Jack one rear up, and support it safely. Get a buddy, or get yourself where you can watch the driveshaft accurately.

Mark the tire, or use the valve stem. If you don't have posi, you can now turn the shaft when in neutral. Turn the shaft once, and the tire will turn "double" the ratio. That is, a 3.23 will turn the tire 6.46 times

If you really want to get "accurate", mark the shaft so you don't get "lost" and turn the shaft TEN turns. Of course now for 3.23, you'll have to turn the tire 64.6 times!!

richinny · 05-02-2008, 11:21 AM

probably a 2.76

78D200 · 05-02-2008, 04:16 PM

if you pull the diff cover, it is sometimes printed on the ring gear. you just have to learn which numbers to read.

04-15-2007, 09:28 PM	#1 (permalink)
318scamp Junior Member Join Date: Apr 2007 Posts: 4	7 and 1/4" gear ratio? I have a 1972 Scamp with a decently built 318 and I was wondering if anybody knows what gears came in the 7 and 1/4" rear end. i ran the numbers a long time ago and all i found out is that it is a 7 not an 8 and 1/4. im gettin the car dynod on wednesday.

04-27-2007, 04:05 PM	#2 (permalink)
cudakid69 Junior Member Join Date: Apr 2007 Location: New Hampshire Posts: 9	I'm not possitive on this, seeing as I don't know scamps that well, but maybe 2.94 or 3.23? __________________ The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair.

05-02-2008, 04:16 PM	#6 (permalink)
78D200 Ph.D in wheelinology Join Date: Apr 2008 Location: Manchester, NH Posts: 447	if you pull the diff cover, it is sometimes printed on the ring gear. you just have to learn which numbers to read. __________________ Tim and Heather 1974 J10 - getting built up some more. built 360, built TH400, D300, D60(detroit)/14B(spool), SOA, inboard rear 64" springs, 38.5 thornbirds jeep pics - http://s149.photobucket.com/albums/s63/jeeping1974/J10/

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12-23-2007, 06:17 PM	#3 (permalink)
steve74swinger Junior Member Join Date: Dec 2007 Posts: 9	Hey 318 scamp my 74 swinger has 2.72 in the rear end. there is a tad on one of the cover bolt if you can look...the tag will have the ratio on it...well if it is still there

12-24-2007, 08:08 AM	#4 (permalink)
440roadrunner Senior Member Join Date: Nov 2007 Posts: 272	Geez, just jack up the car!! I doubt this has a posi, so you'll only need one tire up. Jack one rear up, and support it safely. Get a buddy, or get yourself where you can watch the driveshaft accurately. Mark the tire, or use the valve stem. If you don't have posi, you can now turn the shaft when in neutral. Turn the shaft once, and the tire will turn "double" the ratio. That is, a 3.23 will turn the tire 6.46 times If you really want to get "accurate", mark the shaft so you don't get "lost" and turn the shaft TEN turns. Of course now for 3.23, you'll have to turn the tire 64.6 times!!

05-02-2008, 11:21 AM	#5 (permalink)
richinny Senior Member Join Date: Apr 2008 Posts: 115	probably a 2.76