6 speed shenanigans. RA60F swap to RC62F

Well, that was fun. Decided to do this job at home. Been a while since I did work like this while lying on my back. I don’t miss it.






UPS truck showed up while I was in the driveway working. Giggity.

 

Important measurement here. I was just trying to get a rudimentary measurement of the bell housing to TOB contact surface to use a reference when setting up the new Tilton HRB. With a fairly new clutch, 108mm is where it was sitting. So +3mm clutch wear clearance means that I should be in the neighborhood of 111mm when I set up the new one.

 

Finally got these two together in the same place. I’m actually pretty stoked. This thing is basically bolt up. Hardware from xmember to insulator went from M8 to M10. But, holes in the xmember are large enough. No problem there. Same mounting pattern. Same height to center of output sleeve. Aside from the 24mm transmission length difference necessitating an abbreviated rear propeller shaft and a lengthened front, it’s a gimme. Yes, the shifter is further back. But, not by too far (46mm) I’ve got a couple of ideas on how to deal with that.

 

Seems I'm a touch late finding this thread as I just got a good used ra60 and put out for the CM hydro bearing back in December.
That said something occurs to me regarding the drive shafts. If the truck is lifted then the inch of offset gained on the rear shaft may be of no consequence. As for the front a properly made spacer as mentioned indeed seems a viable solution.
Lastly the convo on pilots and the moments of force that can occur was a pleasant read. Thanks for that.

 

That is not correct. You will still need the driveshaft modified. It is due to the length change is before the carrier bearing. One inch after the bearing would have been ok.

 

I’ve got the day off today. So, will be running around a bit. Dropping off flywheel and the driveshaft (different shops) to be surfaced and shortened. Gonna throw in new ujoints for peace-of-mind as well.

Got the TO bearing set up on the Tilton piston yesterday as well. A few pics of that in the other thread if anyone is interested.

New Spec 3+ clutch is in the mail.

Need to order up front shaft spacer today as well.

The Core shifter is very tempting. I’ve been talking with Chris there about it. I think I’ll wait to get the trans in and bolted up before I order that up tho. I want to see where it all sits first.

 

Would the front drive shaft from a 16+ work? Those must be a dime a dozen.

 

I'm not saying it's correct, but The front drive shaft from the automatic 2005 - 2015 cross references (on car-part.com) to the 2016+ 6speed manual trucks.

 

Does the transfer case have a different casting between the 2nd/3rd trucks? Or the flange(s) on the pinion or output shaft of the TC differ making up the difference in length of the trans ultimately making the driveshafts cross compatible? Spit-balling here..

 

what is the part circled in red called? the connector part on mine has been busted for years and it has never come loose to recently. pushed it back in but kinda want to replace it. i know its a sensor just not sure what its called or part number. i know it deals with the reverse signal since i was losing the back up camera and the reverse beep.

 

my guess is there is enough slip in the slip joint for it to work

 

2ND GEN RA60 IS 1" SHORTER THAT THE A750F TRANS. THE RC62 IN THE THIRD GENS IS 1" LONGER THAN THE RA60. I THINK JAKE HAD THE MASURMENTS IN HIS OTHER THREAD. I BELEAVE THE BOLT PATTERNS AND DEMENTIONS OF THE TRANSFER CASES ARE THE SAME.
SORRY FOR CAPS. I USE THEM ALL DAY AT WORK.

 

Edit- rheath08 beat me to it. My guess is the 2nd gen 5 speed auto has the same length as the RC62F 6 speed manual.

 

oh yeah that makes since then. the RC6x = A750f in terms of length.

 

It may. I haven’t had a third gen m/t truck in person yet to measure. Is yours easily accessible?

 

Im not sure on the third gen transfer case. I’m using my original 2nd gen unit. Adapting the third gen unit to my truck looked like more trouble than it was worth.

 

My comments were more "ideas" that could explain why the 2nd and 3rd gen use the same front shaft. I wouldn't bother with the trouble of swapping the TC either.

 

That’s the reverse switch all right. I have yet to see if I can simply swap it out in lieu of the third gen wired switch. If so, that’s super easy obviously. If not, I already have a pigtail ready to make the third gen switch work.

 

Yes, out on the floor right now.

 

any idea on a part number for the RA60?