View Full Version : 1976 RR 2.71 SG???
02-22-2012, 06:01 PM
i pulled a rear end out of a rusted out 1976 RR; i was told by the owner that is was 3.91 SG. i had it in my storage for a couple of months until i could get to it; well it it turns out to be a 2.71 SG;:fire: my wagon is a 2.71 open? just wondering if its worth the trouble to swap it out; and what would i gain? the outer housing looks the same; it will need new seals and maybe bearings since its been sitting for over 10 years out side. if so what would be the part number for a kit (seals & bearings)
PS: i found out a quick way for a rough guess on the ratio; turn the wheel one full turn and count how many times the drive shaft connection turns; mine turned 2 3/4 times. i wish i knew this before hand;
White Aspen R/T
02-22-2012, 09:48 PM
Save your money and leave it for a rainy day. Unless you can boil one tire down to the steel belts the same gear isn't worth it.
02-23-2012, 06:18 AM
The Ring and pinion can be changed the main part is it is a SG. That carrier will work with any ratio. But with gas going to $5.00 a gallon you might not want to!
02-23-2012, 05:18 PM
agreed; since its a not a daily driver; i was wanting a little more punch; i agree with bremeric and will store it in shed until a later time; next to my 360 & 727;
thanks for the comments;
maybe i can find another car that needs a drive line;
03-06-2012, 11:10 AM
2.71s ain't a big deal, you can regear it to 3.21, 3.55, or 3.91 without issue. 2.45s can't be regeared as easily.
If you've got a 998/999 though you won't see much hurt from the 2.7s, I had 2.7s stock but the rear I got had 2.45s, and the 318 didn't even mind those. The 360 never has problems with the 2.45s and nice to get 23 out on the highway with it using the 998 between them.
With the 360 and 2.45s it'd still get up to 60 in under 7 seconds (on the high side), not bad enough to lose 5-8+mpg.
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