Ring and pinion swap
#1
Ring and pinion swap
So I pulled the cover plate off the rear end of my 75 a couple weeks ago and saw that it had the 3.08 gears. I want a little lower gear ratio so i ordered a set of 3.73s. Im going to put them in this week. I think those gears along with my powerglide and 383 stroker is going to scoot that car along pretty good. Im excited about getting these new gears in now all i need is a locking diff, so if anybody has a detroit locker or eaton posi for an 8.5" rear end they would like to sell let me know.
#3
3.73's r real nice just got those in my 81, depending on ur driving style i recomend geting the posi not the detroit locker it'll be brutal when cornering, but hey if u only want performance on the strip who cares right.
#5
I want to be able to drive it on the street and get the best gas mileage a 383 stroker can while being able to take it to the strip and run decent times.
And I have to get a new diff now because the center pin that holds the pinion gears in place wouldn't come out even with me using an air hammer on it for an hour and a half, so finally I just cut it out with a torch. I have another open diff from an 8.6 rear end that im going to use for now just to set back lash and get a good pattern on the gears, and i will just change the differential later because thats not really a huge deal.
And I have to get a new diff now because the center pin that holds the pinion gears in place wouldn't come out even with me using an air hammer on it for an hour and a half, so finally I just cut it out with a torch. I have another open diff from an 8.6 rear end that im going to use for now just to set back lash and get a good pattern on the gears, and i will just change the differential later because thats not really a huge deal.
#7
Yes I did. That differential was toast anyway. It had been run out of fluid because there was like half a quart in there when i pulled the plate and the gears had a bluish tint to them which means they were overheated.
#8
Gas mileage and stroker motors shouldn't be in the same sentence. Add that to a powerglide and your S.O.L. You can drive conservatively, keep your foot out of the carb. But if you get 10 MPG be happy. Thats all I get in my 85 SWB K10. Thats got a 305 w 4 barrel AND a 700r4.
#9
Gas mileage and stroker motors shouldn't be in the same sentence. Add that to a powerglide and your S.O.L. You can drive conservatively, keep your foot out of the carb. But if you get 10 MPG be happy. Thats all I get in my 85 SWB K10. Thats got a 305 w 4 barrel AND a 700r4.
I really don't care a lot about mileage on the toys, but it is nice if they get something halfway decent.
#10
The truck is around 4000#. The tune on the carb needs to be dialed in.I tried to replace all the vacuum lines and get it dialed in. 20ft of hose and I ran out. I hate emissions era Q Jets the most. The fast idle for the choke gets stuck on for some reason. It happens randomly. I don't want to jack this guys thread so if you have any ideas through them in my project thread.