Topic: G series tranny's

[cgbemis]

So from what I can gather, these transmissions aren't as strong as the W series or the R series, but are stronger than the L series. My question is, how much weaker than a W series trns. is the G series? I'm planning on doing a 4x swap onto a 2wd, but finding a decent W series for a decent price, is getting difficult. If I found a G series, would it be the end of the world?

[WHITE_TRASH]

I wouldnt waste my time with a G-series, they are really weak.  Marlin could give you the exacts on al the yota trannies but Im pretty sure that even a L52 is stronger that a G series.

[kyle_22r]

i think it depends on what L series you're comparing to.  i'd take even a G52 over my L43

[Marlin]

81-82 L50 with 75 mm front bearing, 83 L52 with 80 mm front bearing
G  25% stronger
W 50%     ''
R  100%    "

L52 H/D
G same strength
W 25% stronger
R 75%       "

The 81-83 L50,52 trans are 21.5 inches long but have a more rigid cast iron transmission housing
All 84 and newer tranmissions are 4.5 inches longer and use less rigid aluminun housings but hold more gear oil

Marlin

[yotaboy79]

id take any thing but my l43  gernaded 3 and working on the 4th next time it happens the only thing toyota left in the drive train will be dual 23spline cases perchaced from marlin

[Marlin]

L43 side shifting 4 speed's were only found behind 79-80 20R engines.
They were 21.5" long but have the highest first gear of any 4WD trans at 3.67:1. This is the reason all 79-80 trucks always had 4.37:1 ring and pinions.

One of the major draw backs of the L43 is the undersize 19mm countershaft center pin. When the cage bearing and/or center pin hard faceing fails, the countershaft will run out of mesh and then gear failure is certain.
It is very important to maintain .005 to .008 countershaft end play on these transmissions.

2WD trucks used whimpy bronze bushings untill 77'. All 4WD units got the better cage bearings.

Marlin

[roundhouse]

I'd like y to add another question.

WHich, if any, of the Toy transmissions, are strong enough to hold up to a 220 HP small block Ford with 33 or 35 inch tires?

I'm guessing the 5 speeds from the supra would be ok, but are they longer?

An NV 3550 would hold up but is there an adapter to match it to a Toy  gear drive T-case?

Also I read on another site that the 5 speeds in the pre-Previa vans was shorter than any other toy trans.
any truth to this?

[cgbemis [OP]]

The "R" series tranny's are put behind the supercharged 3.4Litre Taco motor at roughly 270HP.

[WHITE_TRASH]

R151f is the strongest trans that yota ever used in the US market.  I believe Marlin said it is good for 300 hp.

[Marlin]

The R transmissions are the same length as the G and W transmissions at 25" long.
I would have no problems putting it behind a 220 hp Ford small block.

The early vans had a W56 with a short 2wd rear housing.
The W56 4wd trans is 25" long also.

Marlin

[cgbemis [OP]]

Does this mean that the early vans have a 4x w56 underneath them, with a weird tail housing? If so, then how does one go about identifying one of these tranny's, and roughly what years do you find them? Only reason I ask, is that the local Ecology auto wrecking usually has a couple of those vans down therer.

[Marlin]

I am not familiar with the 4x4 vans, however, I know that they have a chain driven t/case that is much smaller than the pickup verson. They never got the gear driven t/case because the front output would be way to low and stick out well below the drive train under the van.

I beleive that van did not offer a low range, only 2 high and 4 high.

I recall that the W56 2wd trans has a trans mount that bolts to the top of the rear trans housing.
I have Toyota van fisch at my shop and will look up the drivetrain when I get to the shop.

Marlin