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My tranny guy dropped my 4 speed and broke the tail shaft housing.
The one he dropped has speedometer connection on drivers side. So far he has only replacements with speedo connection on passenger side. Car is a 68 coupe, not original in any way. I currently do not even have a speedo cable. Any info? Were driver side for Vettes abd passenger for others? Is a Vette passenger side speedo cable available? TIA
Ok I have checked the AIM, and I am…. Confused. First, this shows speedo cable, but not where ot connects on the tranny itself It states this simple as speedo cable “routing”
This appears to show the speedo cable coming from the passenger side running through the tranny tunnel, and coming up and going in from middle to enter the cabin.
I did a Google, and it said 67 and 68 Muncies had speedo connection on the driver’s side. Dad always said this was a 68 M22..AIM only mentions M20. Tranny shop os definite it is driver’s side. Says he has lots of tailshaft housings that are passenger side, but no driver’s side. So I am no wiser by the AIM, and still unsure of what to do.
I did a Google, and it said 67 and 68 Muncies had speedo connection on the driver’s side. Dad always said this was a 68 M22..AIM only mentions M20. Tranny shop os definite it is driver’s side. Says he has lots of tailshaft housings that are passenger side, but no driver’s side. So I am no wiser by the AIM, and still unsure of what to do.
Well one good thing from that article is if the tranny had a driver’s side gear and comnection, you can not just replace it with a passenger side tail shaft housing. Tranny guy does have another tranny ready to go he would swap. It has a passenger side speedo connection. He is going to check numbers on both trannys to see whether either of them are M22 or define what they are
Giddy-up Go
Did you get an answer?
If not I can go eyeball the 1968 M21 I have tucked away in the garage.
Originally Posted by Giddy-up Go
My tranny guy dropped my 4 speed and broke the tail shaft housing.
The one he dropped has speedometer connection on drivers side. So far he has only replacements with speedo connection on passenger side. Car is a 68 coupe, not original in any way. I currently do not even have a speedo cable. Any info? Were driver side for Vettes abd passenger for others? Is a Vette passenger side speedo cable available? TIA
Well one good thing from that article is if the tranny had a driver’s side gear and comnection, you can not just replace it with a passenger side tail shaft housing. Tranny guy does have another tranny ready to go he would swap. It has a passenger side speedo connection. He is going to check numbers on both trannys to see whether either of them are M22 or define what they are
Yep if it has the original 1965 and earlier mainshaft - the speedo gear section on it won't be long enough to position the speedo gear in the correct location for the later (right side speedo) t'hsg
You need to know what rear end ratio you have so that if you switch tranny's you put in a tranny with "matching" gears - wide or close ratio ?
My rear end ratio is a 4/11. I believe Dad got it from the same guy as the tranny. And yes, it definitely a 4/11
Drivers side speedo trannies are for 1965 down applications .
So your car definitely does not have the correct tranny (or tailhousing) to start with
Passenger side speedo conection for ALL '66 and up cars OTHER than Pontiacs
Speedo cables for either side should be readily available - nothing special about either side - just different lengths
You can not determine whether it is actually an M22 OR NOT from ANY NUMBERS on the cases !
Most of the parts are interchangeable over the years - you (he) could have a tranny stamped with M22 code and it could have M20 gears in it or vice versa
Don't know how your old man "knew" it was a '68 M22 - somebody probably just "snowed" him LOL
That is probably WHY there isn't a speedo cable in the car because someone just stuck the early Muncie in it (to sell ??)
I don't have to look anywhere for this stuff - I KNOW
I JUST GOT IT !!
If your father bought the tranny loose I can "see" where he might think it was an M22
A lot of Muncie replacement input shafts AND early '65 and down tranny's DO NOT have the ratio identifier circular grooves on the input shaft - one ring for M21 and two rings for wide ratio M2O
M22 tranny's do not have any ring grooves and people see a tranny without ANY grooves and assume it's an M22 when actually it can be a '65 and earlier M20
Dad got the tranny “loose” from a vendor at the Canfield Fairgrounds by Dragway 42. Guy had the rep of being knowledgeable and dependable especially amongst the racers at 42. He sold Dad the rear end as a 4/11 and it is. Now this was nearly 40 years ago and I never had the whole story- I was an adult by then (well supposedly) and I have slept some since then, but Dad a thorough old school mechanic that I never recall getting the wool pulled over his eyes. He researched stuff for the Vette (and all his other projects)!as he wanted car to be as original as possible. (He bought it as what we would call a barn find, wrecked, no engine and tranny, and parts galore in bushel baskets (I still have parts sorted in them). Anyway appreciate the insight and help.
Muncie speedometer question
