Hi to all, just wondering if anyone knows what this number is as Ive taken it off my transmission on my 56 98: D 7 8615013 Looks to be a 'slant' pan type as it has 2 pans, 1 on the left and 1 on the bottom, looking at it from behind. Im guessing 'R' type ******?? Wanted to confirm the I.D number if anybody knows, as im about to put in a 55 combo and hoping it will fit right in without mods.. My shift quadrant reads P N D S L R Thanks
I am confused what you wrote: If it has a park position, it is not a hydramatic...or is that the car that the 55 motor and trans are going into? A 56 98 would have had a P, and the trans would have been a Jetaway. The 55 will be a Hydramatic without a true P position.
This is why im confused... I pulled out the ****** i explained in first post.. My shift quadrant has a P on it.. Maybe the ****** is not original as I thought, but it fits exactly where the transmission mounts are meant to be.. So a 55/56 'R' type slant pan will fit in a 56 98 no problem.. So the 55 combo I have can go straight in without any mods..
The 'slant pan' hydro is so called because the bottom pan is wedge shaped, not because it has two pans. The pan is wedge shaped due to clearance issues after the hydro was rotated in order to lower the trans hump. As F&J stated, if the transmission has a Parking position, it'd be a Jetaway. Jetaway's came in the '56 98's. The '56 Jetaway and '55 Hydro are different transmissions, though, I'm not sure if they have different mounting points. Also, I'm still confused as to what a 'R' type ****** is?
Let's start over If you do an "advanced search" using Squirrel as the poster, and put in "hydramatic ID" for the thread, you should be able to find the list he just put up about a week ago, giving all the trans ID numbers/letters. If your trans is not on that list, it must not be a hydra. As far as it fitting the body? In 56 Olds only, those came with both types of transmissions, the cheaper 88 still had the hydra. So, I can't believe the floors or ch***is was different between both? Not sure about the trans mount crosspiece, or driveshaft yoke or shaft length. Things get wrong when you try switching an engine to the different trans, because the hydra and jetaway cranks are different. I never saw the jetaway difference, but has something to do with the pilot in the center. I have no clue if the jetaway needs a pilot or not, but the hydra and stick transmissions share the exact same pilot/and bushing.
Yes, it's a changeover year, Pontiac did the same thing. Just because the quadrant on the column has a P on it, though, doesn't mean someone didn't put in the older trans at some later date - how many positions does the shifter on the trans itself go through?
It seems to have 5 or 6.. Bit hard to tell when Im shifting it up and down.. Ill just put the same type back in and be done with it.. What it is, is what it is.. Thanks
Move it all the way to one end, that's one, pull until it clicks and count. The two transmissions are completely different, so you need to know what it is to even replace it. I had one once lose all ability to tell what gear it was in - a spring that held a check ball in place broke. It would shift and all, but it was like the shifter was attached to nothing. Was an expensive bill for like a one dollar part.
If you look at the trans ID chart that Squirrel posted, you will see that 54-56 Oldsmobiles had O and R type hydros. The O I believe was for the shorter 88 cars, while the R type was for the 98 models. Before 54 there was R and RA types, the RA meaning Right After Fire, which was in 53.
Says something in my '56 manual, that the ****** mounts need to be switched over between hydromatic and Jetaway. Not sure, but it sounds like you use the same mount, but on one it points to the front and on the other to the back.
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