Hello guys can you tell me what type of posi I need for my 72 electra w/455 and th400 tranny I will eventually put on 22-24" rims, but I will occasionally take it to the track. Also what will I have to do to get more torque I hear this is what I need to get the boat to move. thanx much p.s. trying to get quality for the most reasonable price possible. thanx
A lack of every Buick part here on the other side of the pond.... but 2x 9 3/8 posis as a spare laying around in my garage ou:
75riv how much would you charge me for that posi? I would need it shipped to milwaukee, wisconsin 53206. Thanx much :TU:
Also, fellas I'm totally new to this whole posi rearend thing, so can you tell what is the gear ratio and is this considered a 10 bolt or 12 bolt? Also does this operation consists of replacing the whole rear end or is it gutting my rear end (no pun intended) uzzled: and replacing it with the new posi stuff?
It's a 12 bolt... If you want to buy just the carrier, and have it installed, it would be a good idea to find someone in the business to do it for you. Of course, the easiest thing to do, is find a complete good rear and swap it in....but that doesn't happen most of the time.
Searching for a '71+ 9 3/8 BUICK posi, will also need to know what ratio of rearend one has & if a posi is located, which ratio of carrier it is. The '71+ BUICK 9 3/8's with 2.73's, 2.93's & 3.23's took the mid ratio carrier, & the 3.42's took the low ratio carrier. There was even a high ratio carrier which will be fited with 2.56's. Have cut housing ends off several 9 3/8 rears that had the 2.56's... really doggy ratio. Got Posi? :3gears: Roger
With 22" rims, what will the tire profile be? If the entire wheel/tire combo will be no taller than the stock combo, then a set of 3.23's are nice for all around driving. 3.42's you will pay the highest price for....2.93's are not as desireable, but are still not cheap, when you find them. Your stock 2.73 gears will do, but the 3.23's a more fun!
If you're running 22 inch rims it sounds like you will be running a much taller wheel size then the standard, so you would need lower gears (higher number 3.23 > 3.42 ) to compensate for the size difference. The car will be geared taller (lower number) because of the larger wheel size, it will make it a nice highway cruiser with the larger wheels, but slower off the line. Example: Standard wheel size, engine turning 2000 rpm's at 70 mph with 2.73 gears Larger wheel size, engine turning 1600 rpm's at 70 mph with 2.73 gears because it takes the larger wheel longer to make one rotation in comparison to the standard wheel, thus making the engine having oly to rev at 1600 rpm's
How are the carriers dimensioned differently to fit the different ratios? You would think the ring gear would just exchange, but I guess not?
Hello fellas I need the the car to be quick and able to plant that power off the line, with the 22 inch rims. Which one do I need, and what type of performance with I get with my standard rearend? I just know that with the posi it'll get me two tires planted instead of one.
