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Posted: 02/03/06 06:30 AM
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Im getting ready to rebuild a saginaw 4 speed....I have never done it before...i can rebuild engines all day long but they dont really have alot of small parts to get lost. I was wanting to know if anyone has any advice on how to start or any helpful tips... I have the option of the saginaw or a TH350... Id rather have the extra gear and be able to grab my own gears...also to have better acceleration cause the car will be lightweight/low torque with a high gear in the rear end. Also..any advice on a decent shifter to buy?...Im not really looking for a hi dollar ultra race shifter or anything...i just dont have a shifter. Please and thank you. _shred
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oldBogie
Guru
| Posts: 1195
| Joined: 08/03
Posted: 02/20/06 10:31 AM
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Here's a couple sources for parts both are quite good and know there stuff.
http://www.dandltransmission.com/index.htm
http://www.kajunjon.com/Main/
The Saginaw 4 speed was mostly used behind 4 and 6 cylinders and some mild V8s not exceeding 350 cubic inches. In fact many 1960, 70 and early 80s Corvettes used them with the things like the L48, something that catches their owners by surprise. So this indicates that they are safe with cars of around 180-200 hp that weigh around 3500-3700 pounds.
They're not intended for life behind 300 - 400 hp engines, but consider that as vehicle weight comes down the amount of power they will absorb goes up. However, tire adhesion figures in this, so as tire size gets wider or tread compound gets softer the power to bust it loose goes up. Gearing is also important, a powerful engine with high gears puts a lot of strain on the driveline during acceleration.
Used reasonably, this is a nice transmission. I've used them in V8 swaps into Corvairs, Vegas, and Monzas with good reliability. Keep in mind that trannys from behind 4 and 6 cylinder engines tend to have a pretty deep low, like on the order of 3.11:1.
Bogie
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Posted: 02/20/06 06:59 PM
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yup...i love you Bogie...its official. but yes...it will be in a light car..Monza...looking at around 2800 pounds give or take some for curb weight. Also itll be a low torque engine so Im looking forward to the lower gears. Its just so expensive to do it, autos are so popular...i dont know why...darn...guess i'll just have to sell some stuff. You know anything about swapping a cable clutch into an original z-bar car?...I like the feel of a cable clutch better than hydraulic...has more "feel". God bless -Shred
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Posted: 03/07/06 04:18 PM
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Anyway to tell which gears came in a saginaw by looking up the numbers ?
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