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I'm just wondering I thought I was told one time at in 79 jeep only put the t 18 transmissions in 150 cj5's I'm probably wrong can some one help me out with this I got a 79 with a 258 and a t 18 Trans. Thank you
T 18 Transmission in 79 cj5
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The 1979 CJs most definitely came with the T18A, there is the window sticker from mine:
This is additional info from Novak that I can confirm via the shift pattern on my 1979:
All Jeep CJ's from 1977 to 1979 had wide-ratio T18 with the 6.32:1 first gear. No front adapter plate is present on these models. 1976-1979 T18 transmissions can be adapted to GM V6 or V8 by use of a T18 adapter kit that we manufacture, kit #1879. Jeep CJ T18's from 1976-1978 may be cast with #13-01-097-907.
The 1979 Jeep CJ T18 is similar to the 1976-1978 versions, except that it features a wider front bearing and a different top cover with aluminum shift forks and a different shift pattern with reverse gear being over to the right and down. These T18's may have a case casting number of 13-01-065-904 and a top cover casting of #13-01-065-906.
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T-18 in a cj 7
I beg to differ. the T-18 that came in all the CJ series had like a 4.21 FIRST GEAR. The T-18's that came in full size Jeep trucks had the 6.32:1 granny low first gear. Parts Mike makes a conversion kit to convert the Full size truck transmission for use in the CJ since the input shaft on the full size truck is twice as long as the CJ input shaft. I have done several on these conversions.
I beg to differ. the T-18 that came in all the CJ series had like a 4.21 FIRST GEAR. The T-18's that came in full size Jeep trucks had the 6.32:1 granny low first gear. Parts Mike makes a conversion kit to convert the Full size truck transmission for use in the CJ since the input shaft on the full size truck is twice as long as the CJ input shaft. I have done several on these conversions.
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Actually, I believe it was a 4.09 first gear. 2nd and 3rd gears were also numerically lower than T-18s with the granny low.
Matt
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Many of these guys know more about this subject than I do and are actually the ones who helped me, but given that I just tore apart my T18 3 days ago for a $1 repair, I'll offer what I know. Jeeps from the factory in the years mentioned above, if paired with the T18, first gear was a 4:1 give or take first gear ratio. It was the Ford T18A that had the 6.32:1 first gear (the one I bought and adapted). Therefore, if it's factory Jeep T18, its likely to be the 4:1 ratio.
Here is the link to the Novak Conversions page about the T18. Pretty sure they are a trustworthy source regarding transmissions and such, which is why I cited them in my initial reply. Do with the information what you will:
https://www.novak-adapt.com/knowledge/transmissions/manual/t18-t19
https://www.novak-adapt.com/knowledge/transmissions/manual/t18-t19
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That reminds me when people say they never put a T-177 in a CJ only T-176 although a lot of people find then in their CJ's anyway.
I'm sure they put in whatever was available. Just like Dana 44's in '86 Jeeps.
I'm sure they put in whatever was available. Just like Dana 44's in '86 Jeeps.
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Best of all worlds.... !!
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The plug on top... just behind the 3 knobs/bumps. I have a switch screwed into that hole (single post) but no wire going to it so it's a mystery. A neutral or reverse sensor switch, maybe?
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Most FSJ T-18's I'm aware of had a long input shaft with spacer block to move the engine out from the firewall. Also, I believe 72 thru 76 CJ's had the close ratio T-18's with 4.02 first gear. Later T-18s were wide ratio. I had friends with 77 and 78 CJ-5's with wide ratio T-18's.
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From my research and what I've actually found, T-176's with 3.52 first gear were only used in 80 CJ's. 81 and later T-176's are actually T-177's (3.82 first gear). Makes sense because in 81 they went to higher rearend ratios (2.73, 3.31) so they lowered first gear. You're right John, Novak's web site and other places say T-177's were never used in CJ's (or words to that effect) but we know better.
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The 77-79 CJ T18 did have the 6.32 first gear. I've owned several, one of which is currently in my 75 CJ5 (swapped from a 79). Any factory service manual for these years will also corroborate this as the equipment lists and gear ratios are shown in the manuals. oljeep.com has factory manuals in free downloads if anyone wants to look.
For 76, it's hit and miss as it was a transition year. Some (later 76 production) have the 6.32, some don't (early 76 production). All of the 76-79 CJ versions have the 6.5"ish input shaft and share the same bellhousing as the T150 as it has multiple bolt patterns drilled into it.
The 72 through 75 had a 4.03:1 first gear. This one had a longer input shaft and also used a 1" spacer to adapt the T18 bolt pattern to the T14/T15 bellhousing's bolt pattern. I have a couple of these as well.
Reverse on any throught 1978 is far right and up. For 79 and newer they are far right and down.
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