drifterboy240 Posted February 15, 2012 Share Posted February 15, 2012 Ok so im planning to put a sbc into my 240z using the JTR kit but my question is what trans to use so I can keep my car a manual transmission I have tried to search but still couldnt find an exact answer on what transmissions to use. Any insight to help me is much appreciated. And again yes I did use the search button. And no it dont matter if I use a 4 or 5spd transmission Quote Link to comment Share on other sites More sharing options...
Jasonmreiss Posted February 15, 2012 Share Posted February 15, 2012 '87 to '92 world class t5 out of a camaro....cheaper but not as strong. Or '94 to '97 t56...pretty spendy but stronger. Quote Link to comment Share on other sites More sharing options...
drifterboy240 Posted February 15, 2012 Author Share Posted February 15, 2012 Ok thanks Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted February 16, 2012 Share Posted February 16, 2012 borg super t10 or muncie rock crusher 4 speed.most 4 speed and 5 speed gear boxes are 1to1 in 4th gear.the old american 4 speeds will have external shift linkages-as in hurst shifter with external rods. Quote Link to comment Share on other sites More sharing options...
Jasonmreiss Posted February 16, 2012 Share Posted February 16, 2012 I'm also in the market for a trans behind a sbc. It's my understanding though that not all options will line up with the stock shifter hole. I don't really know which Quote Link to comment Share on other sites More sharing options...
GOTHALOSISM Posted February 16, 2012 Share Posted February 16, 2012 I went with the WC T-5 since it was really cheap compared to the t56. (spent $250 for mine with new clutch and flywheel off of cl, compared to a T56 on CL for $1200 without the extras). I'm pushing close to 310hp/340tq and have had no issues with it all. For the T5 you have to trim the shifter hole a tad on the drivers side, but not much. Quote Link to comment Share on other sites More sharing options...
78Z/250GTO Posted February 20, 2012 Share Posted February 20, 2012 I used a tko600 on my build. A bit more money, lighter and smaller than the t56, it will not break like the t5,but fits exactly like a t5. Quote Link to comment Share on other sites More sharing options...
Michael Posted February 20, 2012 Share Posted February 20, 2012 To be pedantic, this probably belongs in the "drivetrain" subforum. The "world class" T5 is probably adequate for most applications, as the limiting factor will likely first be rear-wheel traction, rather than driveline stresses. The disadvantage of most domestic 4-speeds is the narrow spread between 1st and 4th gear. For a torquey engine in a light car, all of that shifting will be superfluous. And the highest gear is still too deep for comfortable highway cruising. A good example is my own mistake: I went with a Doug Nash 5-speed. Yes, it's a 5-speed, but 5th gear is 1:1. First gear is 3.27:1. So the highest to lowest ratio, 3.27 to 1, is quite narrow. The 4-speeds are even worse... some of them have a 2.2:1 first gear and 1:1 fifth. Unfortunately manual transmission options have not been improving over the years with anything close to the vigor that we've seen on the engine side. When the JTR manual first became popular, in the late 1990s, the LS engine series was just starting to hit the market, and the Datsun swap of choice was the traditional carbureted 350. The manual transmission choices were T5, the then-cumbersome T56, and the 4-speeds. Well, the T56 is still cumbersome. Just about the only change in the past dozen+ years has been the aftermarket support for the T5 (Forte's, G-force) - which is substantial and very good, but also very pricey ($2500 for a G-Force T5 upgrade). Quote Link to comment Share on other sites More sharing options...
GOTHALOSISM Posted February 21, 2012 Share Posted February 21, 2012 You can get the internals for the T5 to make it almost bullet proof. I believe they use cobra internals. Quote Link to comment Share on other sites More sharing options...
wildwillie Posted February 23, 2012 Share Posted February 23, 2012 I used a muncie 4-speed in my 280z. I made a bracket for the hurst shifter that extended it towards the rear so that the shifter would come up in the original hole. You will also have to extend the shifter rods. I just spliced in some extra rod til it was the correct length. I had to massage the trans tunnel a little to have room for the shifter and rods, but it wasn't too bad. I made my own motor mounts so I offset the engine just a tad to get room between the headers and the steering shaft, so you might have a tighter fit. I'm not familiar with the JTR kit. Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted March 21, 2012 Share Posted March 21, 2012 You can get the internals for the T5 to make it almost bullet proof. I believe they use cobra internals. Yep, that's what I did. Got everything from 'thegearbox.org'. I've had no issues, due to the fault of the trans. T5 is also lighter and smaller than the T56. You can make it as strong as you need it to be. Quote Link to comment Share on other sites More sharing options...
NCchris Posted March 21, 2012 Share Posted March 21, 2012 FWIW, I found that it wasn't easy to find a World Class T5 that fit the V8. I did locate a Camaro part out and got the tranny, bellhousing, flywheel and shifter. Too many people were trying to sell me the WC tranny from a V6! chris Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted March 21, 2012 Share Posted March 21, 2012 I used to work as a ford dealer tech and repaired t5's-I really didnt see any problems from an overloaded trans.1 of the other techs was drag racing a 88 mustang with a t5.engine was out to 347" and had a supercharger.Car was running high 10's in the 1/4 mile.The trans broke at about 80 runs.After removal it was found the the owner had forgotten to install a pilot bearing in the back of the crank.Since I am more of a road course kind of guy I would have no problem running a t5 Quote Link to comment Share on other sites More sharing options...
traeg Posted March 22, 2012 Share Posted March 22, 2012 I am in the middle of installing a sbc and WC T5 now. I am running an older bell housing and a mustang tailhousing and topplate so its not sitting and the weird ass angle. Quote Link to comment Share on other sites More sharing options...
Pyro Posted March 24, 2012 Share Posted March 24, 2012 World class or non-world class T5 are both good. The important thing is to get a T5 from a V8 car and not a V6. The number of splines on the input shaft is the way to tell if it is a V8 or V6 trans. I forget the exact count but i think it is 26 splines on the V8 trans and around 10 on the V6 trans (easy to see). Just go easy on the trans. Shift kind of slow, try to avoid full power in 5th gear and dumping the clutch. Quote Link to comment Share on other sites More sharing options...
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