Twincam16seca Posted February 10, 2011 Report Posted February 10, 2011 Hi everyone, Just wondering what W5* series gearbox suits the ae71 best and what would it be from, as not to put the speedo out? I know it would also depend on the diff ratio, i was planning on using a corona disc brake diff, i think the ratio is 3.86:1 or something close it. SO i guess the question is what gearbox goes with what diff ratio the best? Any help is appreciated! Quote
beerhead Posted February 10, 2011 Report Posted February 10, 2011 W55 is basically a truck box IMO. W57 or W58 if you don't want a big gap between 2nd and 3rd. W57 is basically a close ratio box, W58 is the same with a longer overdrive so you can run a higher ratio diff an still get decent fuel economy down the highway. Quote
Sam_Q Posted February 10, 2011 Report Posted February 10, 2011 the W56 is the truck box. The W55 has close ratios to the T50 Quote
beerhead Posted February 10, 2011 Report Posted February 10, 2011 In track condition the T50 suffers similar gap issues as a W55, I'd chose a W58 or W57 for a performance car every time. It's the reason why W57's and W58's are sought after, and cost a bit more money. Quote
Sam_Q Posted February 10, 2011 Report Posted February 10, 2011 I agree with you on the gap in the ratios however the first gear is long as, so unless you run a different diff ratio to make up for it I would think smaller engines would take too long to get off the line. As for the second point I doubt it, I think it's peoples ignorance. Over and over again I hear people buying and fitting W58s and when asked why they say oh its the strongest one... right Quote
beerhead Posted February 10, 2011 Report Posted February 10, 2011 Well I think the metallurgy of the material they make the teeth from would have gotten better over the years, if it's a JZA80 W58 box, that rule of thumb would be true, they also run a strong magnet in the bottom of the sandwich plate in the oil to collect metal filings. But yeah, people do think they're stronger, but you can find W58's with an alloy sandwich plate - it's all the steel center boxes with the wider bearings that should be stronger. Stupid part is it isn't the bearings that go in a W box, it's 2nd gear thanks to end float. I've seen piles of W boxes with chewed off 2nd gear and you can see that 4mm of the tooth wasn't even engaged when it failed. Quote
Sam_Q Posted February 10, 2011 Report Posted February 10, 2011 well said 4mm is horrendus, so when you mean end float can you elaborate a bit more? shaft flex? Quote
beerhead Posted February 10, 2011 Report Posted February 10, 2011 Yeah I'm not sure exactly what happens. Someone I know has a collection of boxes all broken exactly the same with a 500hp 350chev. It's normally under a flat shift of 2nd gear down the 1/4 mile. Because of the angular gears and add a massive torque of the motor when you drop the clutch 2nd just slides out a bit and you have 20% of the tooth not engaged and it just chews the gear off. Quote
Twincam16seca Posted February 24, 2011 Author Report Posted February 24, 2011 (edited) Does anyone know if there is a bell housing to fit 4A engine to celica steel case 5 speed? as it has different bolt holes on the mounting face Edited February 24, 2011 by Twincam16seca Quote
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