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Old 02-22-2014, 10:02 PM   #1
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What kind of tranny is this?

Forgive my ignorance here...just came into this 66' CJ5 with a V6 and a manual trans.It has a regular 4speed and two other levers that say high & low case.Am I correct here-16 forward gears and 4 reverse? Is this an OEM option or something that was retro-ed.

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Old 02-22-2014, 10:19 PM   #2
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I cant really help with your question but i was wondering how you came up with 16 forward? I understand 8, 4 low gears and 4 high gears, but not 16. If the gears were split like that you wouldnt really be able to use all 8, toyota tried something like that before and failed.

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Old 02-23-2014, 10:08 AM   #3
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Yeah you're right, you can't be in 2wd and 4wd at the same time.I still do not understand why there are two transfer case levers, both marked hi/lo...seems like overkill.
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Old 02-23-2014, 11:31 AM   #4
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1 lever on the transfer case is the hi and low range selector..the other one is 2 or 4 wheel drive selector..this was the stock set up on the spicer 18 transfer case which yours should have..this transfer case was used from 1945-1971..warner t-98a 4 speed was optional on all models from 1955-71 ..t-86aa 3 speed was the standard tranny for v6 models
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Old 03-01-2014, 12:41 PM   #5
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I have a 67 CJ5 with the Dauntless 225 V6 and it originally came with a T86 3 speed and a single lever Dana 18 t-case with a Warn overdrive. I swapped in a SM20 4 speed trans and a dual stick Dana 18 t-case. My jeep now has 16 forward gears and 4 reverse gears and it has 4 total shifters, 1 Transmission, 2 Transfer case and 1 for the overdrive. The available gears are as follows:

4 Forward, t-case in high, no overdrive
4 Forward, t-case in high, overdrive engaged
4 Forward, t-case in low, no overdrive
4 Forward, t-case in low, overdrive engaged
1 Reverse case in high, no overdrive
1 Reverse case in high, overdrive engaged
1 Reverse case in low, no overdrive
1 Reverse case in low, overdrive engaged

Not sure if someone has done a 4 speed swap in your jeep or not but if you only have 3 shifters you may have a single t-case shifter and if you have an overdrive you would still be able to accomplish the same # of gear selections as you would with 4.
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Old 03-02-2014, 10:02 AM   #6
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Quote:
Originally Posted by harleydragon View Post
1 lever on the transfer case is the hi and low range selector..the other one is 2 or 4 wheel drive selector..this was the stock set up on the spicer 18 transfer case which yours should have..this transfer case was used from 1945-1971..warner t-98a 4 speed was optional on all models from 1955-71 ..t-86aa 3 speed was the standard tranny for v6 models
Just to piggyback on this, the T14 was also used behind the V6 though it was only a 3 speed.
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Old 03-05-2014, 09:09 AM   #7
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Quote:
Originally Posted by CJ7nvrstk View Post
Just to piggyback on this, the T14 was also used behind the V6 though it was only a 3 speed.
Yep, but only in 68 and newer. It is a much better transmission than the T86. A 66 with a factory V6 and 4 speed would be a very rare beast. The T98 4 speed was never used with the 225 to my knowledge-there wasn't a long input main drive gear version. That only leaves the possibility of the T18 and not many of those found homes behind 225's.

The first thing I would do is scrape the grim off the sides of the transmission and see what number is on the case. If that says T86, you probably have the factory case but there is still the possibility it has T90 guts in it. Since the T86's were troublesome with a lot of warranty repairs, a lot of them were converted to the stronger T90A parts which fit the T86 case.

As for the D18, all the V6 applications used the large index case which is the same case used for the D20 and it is significantly stronger the the small index case used with all the eariler 2 lever shifter versions. If you want to switch from a single lever D18 to twin sticks, it is best to just use the front 2 stick housing with the big index case which can be from either a D18 or D20.
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Old 03-09-2014, 10:39 AM   #8
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Thanks JeepJohnson!You nailed it...I made a mistake in my original post. I have a 4 speed shifter plus 3 other shifters, just as you described;the tall one is not marked but I'm assuming its the overdrive,one for 2wd/4wd and one for hi case/lo case.Thanks for clearing that up for me.I'm still a little confused though on why or when you would ever use overdrive and low case together, I know total rookie here!

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