79 4 speed and t case into a 71 40 (1 Viewer)

Joined
Aug 4, 2005
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81
Location
topeka, kansas
can i use the same t case "under dash big knob lever shifter thingy"...or is the 79's different??
if they have a floor shifter for the t case do i have to use it that way or will it bolt up to my t case shifter?
 
Joined
Aug 4, 2005
Messages
81
Location
topeka, kansas
also...if i swap the 4 speed but keep my 4.11 gears, will it make highway driving easier on it or is the rpm-cruise speed going to be about the same as with my 3 speed? its at about 2500 rpm's at about 60 or 65.....i think.
id like to keep my gears if i could.
 
Joined
May 5, 2004
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1,422
Location
Mill Valley, CA
 
 
 
yes you can still use the dash hi lo lever but you need to make it 4 1/2 " longer i just cut and welded mine. No, on lower rpm's the top gear is 1:1 in both trannys
 

red66toy

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Feb 25, 2003
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3,204
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Seattle, WA
 
 
 
Yes the 4spd has the same final gearing as the 3spd. You will gain no top speed with the change. The 4spd is much better than the 3spd. You get an extra gear, which makes the ratios closer and offer a smoother transition. The 4speed also has a lower 1st gear than the 3spd. and first gear is snycronized! :D

Transmission Gears gear ratios
Toyota H42 N/A 4 N/A N/A 3.555, 2.292, 1.410 1.000
Toyota J30 N/A 3 N/A N/A 2.757, 1.691, 1.000
 
Last edited:
Joined
Aug 4, 2005
Messages
81
Location
topeka, kansas
so the first gear is even LOWER!! daaang. that might be awesome!!!

i like the first gear being synched too...much easier in town with all the stoplights.

so for the ultra crawl gear i could keep my 4.11's huh...might be a cool setup.
 

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