changing t176 1st gear ratio -
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post #1 of 4 Old 07-22-2010, 02:31 PM Thread Starter
aero mech
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1980 CJ7 
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changing t176 1st gear ratio

This may be a no brainer for some of you but in a few mounth I'm rebuilding my t176 along with my engine. I was wondering if it is possible to install a different 1st gear that would give me a little more power while in 2wd? I have 4.10 gears and a 4 to 1 kit installed. I just wish for a little more power on the street. Thanks Clay

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post #2 of 4 Old 07-22-2010, 02:51 PM
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The T-177 is the same tranny, with longer output and slightly lower first gear....I guess it's possible to put the guts of one in a 176, but haven't actually seen a writeup on how.

Don't think it'd be worth it, though....T-176 first gear is 3.52, T-177 is 3.82.
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post #3 of 4 Old 07-23-2010, 10:44 AM
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Your gearing isn't really off with 4.10s and a 1:1 top gear. I'd consider adding power to the motor as another option.

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post #4 of 4 Old 07-24-2010, 07:43 AM
Happy Joe
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I had a t-176 and switched the internal gears to gears from a 177? (the lowest first gear transmission of the series, might have been a 178) because of the poor first gear ratio of the 176.
It really didn't make much difference, certainly not enough to justify the effort/expense.
If doing it again I would switch to a 5 speed transmission with a better first gear ratio (4:1) and over drive. I went to a worn out t-5, after the gear experiment (because it was available) but the NVG-35XX series of transmissions is a better option, IMO. I like the 4:1 first gear even spread transmissions much better than higher first gear transmissions or granny low transmissions, both on street and off road. I too have a 4:1 low range transfer case; having tried it with both the t-176/177/178 and the t-5, like the 4:1 transfer with a 4:1 first gear 5 speed the best of every combination that I have driven. The runner up is a 4 speed 4:1 tranny but due to non-sincromesh first, lack of overdrive and very poor shifting I cant recommend the non granny low t-18s (or the granny low versions for that matter).


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