frankenstien
Full Access Member
- Joined
- Dec 27, 2015
- Posts
- 53
- Reaction score
- 1
- Location
- Fairbanks
- First Name
- mike
- Truck Year
- 1974
- Truck Model
- 1500 Sierra Grande
- Engine Size
- 383 CUI
ok so i have another thread here http://www.gmsquarebody.com/forum/showthread.php?t=14731
had the intermediate sprag race explode.
ok so i just got it back in, my clutch pack clearances were good, but as of now, it shifts hard from 1-2(supposed to) 3 is firm, not hard, it wasnt before. but its shifting at about 3500rpm, and my rpm at 55 is like 31-3200, which its ususally 2500-2600. if i give it gas in 3rd, the rpms just pick up it goes but not like it should, it is too cold out, and the transmission isnt overheating or running hot.
the only thing i can think of is, when i air checked the clutches, the fwd's had some blow by the rings, but not by the piston, maybe the ring sealing surface area is damaged? when i built the trans the first time(8 years ago) there was some blow by on the fwd rings as well, but it was a brand new fwd drum
here is my logical(to me) reason i think the issue is the FWD clutches, it has a 2500 stall converter, which is usually like a light switch at 2500rpm. when in D i stall it with the foot brake, it will clime to 3000-3200 but never break the tires loose, accodring to my book, only the fwd clutches are used in D1.
according to the book in L1 the fwds and the low reverse clutches are used, when stalled up with the foot brake again, it breakes the tires at 2500 rpm.
the other issue i had is my detent cable wasnt adjusted right, and may be stretched beyond, but i adjusted it, and its much better, havet test drove again, also, the fluid was about 1qt overfull, im having a hard time getting the fluid level right, hard to see, and no level ground near me.
any insight is appreciated, i am by no means a transmission guy, just need to get it going
had the intermediate sprag race explode.
ok so i just got it back in, my clutch pack clearances were good, but as of now, it shifts hard from 1-2(supposed to) 3 is firm, not hard, it wasnt before. but its shifting at about 3500rpm, and my rpm at 55 is like 31-3200, which its ususally 2500-2600. if i give it gas in 3rd, the rpms just pick up it goes but not like it should, it is too cold out, and the transmission isnt overheating or running hot.
the only thing i can think of is, when i air checked the clutches, the fwd's had some blow by the rings, but not by the piston, maybe the ring sealing surface area is damaged? when i built the trans the first time(8 years ago) there was some blow by on the fwd rings as well, but it was a brand new fwd drum
here is my logical(to me) reason i think the issue is the FWD clutches, it has a 2500 stall converter, which is usually like a light switch at 2500rpm. when in D i stall it with the foot brake, it will clime to 3000-3200 but never break the tires loose, accodring to my book, only the fwd clutches are used in D1.
according to the book in L1 the fwds and the low reverse clutches are used, when stalled up with the foot brake again, it breakes the tires at 2500 rpm.
the other issue i had is my detent cable wasnt adjusted right, and may be stretched beyond, but i adjusted it, and its much better, havet test drove again, also, the fluid was about 1qt overfull, im having a hard time getting the fluid level right, hard to see, and no level ground near me.
any insight is appreciated, i am by no means a transmission guy, just need to get it going