Topshift 3+1 question
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Topshift 3+1 question
Is it possible to take one of the 3+1 toploaders (smod, srod, etc.) and build a topshift 3spd OD? I know it can be done with the more common 3 or 4 speeds but I've yet to read anything about doing this with an overdrive trans.
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There was a top shift version of the 4 speed OD.
3rd one discussed here, no pic though:
http://www.motivegear.com/tech_info/...nny_guide.html
SROD is pretty close to a top shift, just back a little iirc, depending on model.
David Kees sells a top shift for the performace toploader, not sure how he does it.
I would think some internal parts are going to be different to accomodate the shifter connecting to the shift forks.
Notice he sells the trans with the top shift option, but I don't find a top shift kit in his shifter section:
Toploader Price List
The top shift and srod versions are going to be aluminum cased jobs. Best go easy on those as they are not strong.
If you find a way, great. But if you have to start buying expensive parts or multiple transmissions and do machine work, you may want to consider a Mazda or ZF 5er if you can bolt one to your motor. (240/300, sbf, 351w: Mazda or ZF; 335 and 385: ZF with some fiddling in some cases. FE no cigar.)
3rd one discussed here, no pic though:
http://www.motivegear.com/tech_info/...nny_guide.html
SROD is pretty close to a top shift, just back a little iirc, depending on model.
David Kees sells a top shift for the performace toploader, not sure how he does it.
I would think some internal parts are going to be different to accomodate the shifter connecting to the shift forks.
Notice he sells the trans with the top shift option, but I don't find a top shift kit in his shifter section:
Toploader Price List
The top shift and srod versions are going to be aluminum cased jobs. Best go easy on those as they are not strong.
If you find a way, great. But if you have to start buying expensive parts or multiple transmissions and do machine work, you may want to consider a Mazda or ZF 5er if you can bolt one to your motor. (240/300, sbf, 351w: Mazda or ZF; 335 and 385: ZF with some fiddling in some cases. FE no cigar.)
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It's not going into a ford 
I'm building a ****** and already have an aluminum 3+1, but the shifter is way far back and off to the side. it would end up under the seat. can't post pics! it won't work for some reason. Here's a pic
The shifter is 10.5" farther back than the T90 shifter. even an S10 T5 is 4-5 inches farther back.
I'm building a ****** and already have an aluminum 3+1, but the shifter is way far back and off to the side. it would end up under the seat. can't post pics! it won't work for some reason. Here's a pic
The shifter is 10.5" farther back than the T90 shifter. even an S10 T5 is 4-5 inches farther back.
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That's the SROD or Single Rail Over Drive--the rail is in the tube going from the turret to the case.
All I can suggest is shop for a top shift. The iron cased side shift will be worse than the SROD.
Or sell that SROD pos and go another way altogether. You know the ratios suck in those anyway.
Serving suggestions:
The AX15 Transmission - Novak Conversions
All I can suggest is shop for a top shift. The iron cased side shift will be worse than the SROD.
Or sell that SROD pos and go another way altogether. You know the ratios suck in those anyway.
Serving suggestions:
The AX15 Transmission - Novak Conversions
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the tag says it's out of an 88 fox body 5.0. does that mean it came with the 3.07 first gear? that gives me a .70 OD which will go nicely with the 4.11 rear.
I know I forgot this earlier but its a 4cyl 2wd hot rod. this trans will hold up to ~180hp right?
I know I forgot this earlier but its a 4cyl 2wd hot rod. this trans will hold up to ~180hp right?
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You have one of those that still runs?
Your answer:
Quad 4 Specs
Quad 4 RWD Conversion
A t5 is going to work better than the SROD and has better ratios available.
Your answer:
Quad 4 Specs
Quad 4 RWD Conversion
A t5 is going to work better than the SROD and has better ratios available.
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LOL! of course not. I'm lookin tho. I wanted a little more economy and the look of the offy cam towers. my original idea was to use a 289, sleved to 255 and make my own DOHC heads later on. then again I also wanted an early ford mono spring setup up front and a quick change in the rear, but my wallet says otherwise. 
somehow I found out about the quad and using it as a hotrod engine so I went with that. I just figured if I could get the SROD to work I'd just use that since I already have it. but the S10 trans is $100 at the u-pull-it so it's not too bad.
somehow I found out about the quad and using it as a hotrod engine so I went with that. I just figured if I could get the SROD to work I'd just use that since I already have it. but the S10 trans is $100 at the u-pull-it so it's not too bad.
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SROD is a Single Rail shifting OD tranny
SMOD is a side mount shifted OD tranny
They are all actually the same transmission. Ratios vary by engine size.
SMOD has a cast iron case and is as strong as they come. TOD and SROD have the same gearing but are no stronger the the aluminum case T5.
Mustang T5 is no better than the S10. If you take the 1" input out of the S10 and replace it with the 1&1/8" They become equal. The better bearings of the WC offer little to strength because they share the same wimpy aluminum case. You can spend around $800 and have the S10 upgraded to WC with a reinforced rear counter shaft plate but it wont do you much good in a pickup. No matter what you do to a T5 a pickup will destroy the countershaft bearings rather quickly. The bearings are not designed to constantly pull that kind of weight.
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TOD is a Top Shifting OD tranny
SROD is a Single Rail shifting OD tranny
SMOD is a side mount shifted OD tranny
They are all actually the same transmission. Ratios vary by engine size.
SMOD has a cast iron case and is as strong as they come. TOD and SROD have the same gearing but are no stronger the the aluminum case T5.
Mustang T5 is no better than the S10. If you take the 1" input out of the S10 and replace it with the 1&1/8" They become equal. The better bearings of the WC offer little to strength because they share the same wimpy aluminum case. You can spend around $800 and have the S10 upgraded to WC with a reinforced rear counter shaft plate but it wont do you much good in a pickup. No matter what you do to a T5 a pickup will destroy the countershaft bearings rather quickly. The bearings are not designed to constantly pull that kind of weight.
SROD is a Single Rail shifting OD tranny
SMOD is a side mount shifted OD tranny
They are all actually the same transmission. Ratios vary by engine size.
SMOD has a cast iron case and is as strong as they come. TOD and SROD have the same gearing but are no stronger the the aluminum case T5.
Mustang T5 is no better than the S10. If you take the 1" input out of the S10 and replace it with the 1&1/8" They become equal. The better bearings of the WC offer little to strength because they share the same wimpy aluminum case. You can spend around $800 and have the S10 upgraded to WC with a reinforced rear counter shaft plate but it wont do you much good in a pickup. No matter what you do to a T5 a pickup will destroy the countershaft bearings rather quickly. The bearings are not designed to constantly pull that kind of weight.
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TOD is a Top Shifting OD tranny
SROD is a Single Rail shifting OD tranny
SMOD is a side mount shifted OD tranny
They are all actually the same transmission. Ratios vary by engine size.
SMOD has a cast iron case and is as strong as they come. TOD and SROD have the same gearing but are no stronger the the aluminum case T5.
Mustang T5 is no better than the S10. If you take the 1" input out of the S10 and replace it with the 1&1/8" They become equal. The better bearings of the WC offer little to strength because they share the same wimpy aluminum case. You can spend around $800 and have the S10 upgraded to WC with a reinforced rear counter shaft plate but it wont do you much good in a pickup. No matter what you do to a T5 a pickup will destroy the countershaft bearings rather quickly. The bearings are not designed to constantly pull that kind of weight.
SROD is a Single Rail shifting OD tranny
SMOD is a side mount shifted OD tranny
They are all actually the same transmission. Ratios vary by engine size.
SMOD has a cast iron case and is as strong as they come. TOD and SROD have the same gearing but are no stronger the the aluminum case T5.
Mustang T5 is no better than the S10. If you take the 1" input out of the S10 and replace it with the 1&1/8" They become equal. The better bearings of the WC offer little to strength because they share the same wimpy aluminum case. You can spend around $800 and have the S10 upgraded to WC with a reinforced rear counter shaft plate but it wont do you much good in a pickup. No matter what you do to a T5 a pickup will destroy the countershaft bearings rather quickly. The bearings are not designed to constantly pull that kind of weight.
and it'd work just fine in my 2800# truck. it's 400 pounds lighter that a stock short bed single cab S10. I just figured if I could use the SROD I already have, it would make things that much easier. sure the S10 would be better off the line, but they have the same highway gear, which is all I'm really concerned about. I really didn't want to cut and fabricate a new floor if I didn't have to.
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Actually if you find one in your area the TOD would be great for the *****. TOD has a little better 1st, 3.29. You don't see a lot of info on converting the SROD or SMOD to top shift because it costs too much. TOD is the same tranny with no work but it generally costs more than an SROD.
Converting the SROD or SMOD is done with the shifter assembly from a jeep T176. That shifter assembly is worth more than the SROD transmission. When you get right down to it they are all Tremec T170 series transmissions.
Converting the SROD or SMOD is done with the shifter assembly from a jeep T176. That shifter assembly is worth more than the SROD transmission. When you get right down to it they are all Tremec T170 series transmissions.
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It would end up pulling just the same cuz I'd have to compensate for the lower overdrive. unless I could swap said overdrive... why do I have to make everything so damn complicated?
flee market this weekend, one of the biggest vintage car fleemarkets in the area. we'll see what happens!
flee market this weekend, one of the biggest vintage car fleemarkets in the area. we'll see what happens!
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You cannot just change the OD. TOD has 3 different ratios .71, .72, .& .78 If you have plenty of horsepower a .70 OD works. If the horse power is somewhat low a .70 OD will burn more gas than a .80 OD. As soon as you go beyond a fifth over (.80) you must have excess horse power to compensate for low RPM. If you loose 30% of your engines RPM in OD will you still have enough power to drive without increasing fuel consumption? Example; most GM vehicles in the 80s lacked OD because they were more fuel efficient in direct drive. Low compression ratio and high RPM to develope Hp made OD a bad idea. I was one of those people who did not really believe that until I wasted a lot of hard earned money to put a five speed in my 1980 one ton.