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1066 speed trans assembly

F

fordfx413

Member
I'm going to start assembling the speed trans on my 1066. The countershaft nut was originally keyed with a roll pin. It also has the lock washer that keys the shaft and nut together. I got my T/A installation instructions from hy-cap with the T/A. It says " tighten to remove all clearance. Back off then snug up. Nut must be drilled through lower shaft and keyed with 1/8 roll pin." My question is when you assemble the shaft in the case and torque the nut, there isn't much room to get a drill in to drill it. Do you guys have any tips? Thank you
 
Yea, it is a pain but ya can drill it at and angle thru the nut and shaft . Now one thing here did you set the T/A end play ?? no more then .015 end play. and then you have to use the correct shim on the lower shaft to shim the gear . You can do a good job or a so so job or you can do a correct job . The So so job will teach you to do a better job the next time . when drilling at and angle, center punch the nut and use a good sharp 1/8 drill bit use and 1/8x1/2 roll pin. I use a LONG 1/8th drill bit to help with less angle . My drill bit is a foot long. also turn the lower shaft to where you can get in closer as on the left side you can get more room then tryen to go in straight down.
 
You can also tack weld the nut too the shaft with a mig welder. Two spot welds and your good to go. If you have to remove in the future cut the welds with a die grinder with cutting disk.
 
I always lock it in two gears at the same time first. Then tighten it down with grease behind the nut then take it loose and dry it up with brake cleaner and put a dab of loctite on it and tighten it back up. Tightening it first with grease ensure that everything will be find before you stake the nut whichever way ypu want.
 
Ok thanks for the tips! I haven't installed the t/a yet, but what ever shim I need to install in behind the t/a the counter shaft needs the same size shim correct? My t/a came with .030 and .015 for the t/a and .025 and .047 for the counter shaft.
 
Wow who's T/A did you get ?? the ones i use to install came with more shims then that and they all matched in thickness. Ya just had to watch that you did not shim past .100 , if that T/A needed more then they would send you one made different . I set the T/A in the case dry and used aligning dowel and just put two bolts in and snuged them down and set up the dial indicator and check to see how much i had to shim. Do not take the hose clamp off the T/A assembly while handling it and make sure it is tight .
 
The problem with tightening the beejesus out of that nut is that the shafts flexes a little under heavy load. With no give it will stretch to relieve stress. Point is to get it snug and then some combination of roll pin, tack weld etc to keep the nut from turning.
 
I got the kit from hy cap. I can order more shim kits but there kinda pricey. The needle bearing for the counter shaft, and the one in the quill housing look good but I'm thinking of replacing them. How hard are they to renew?
 
Replacing them is not that bad if you have a driver that fits inside the bearing and give equal force on the outer edges as you can break the outer part while driving it in pressing is better a large socket a slug with a hole and all thread will work. Having a friend with a lathe helps to make up stuff like that. And the one guy that said to Tack weld the lower shaft nut Nah don't do that as it will mess up the threads Drill it even if ya have to go by a long 1/8th bit . Hy Cap must be getting Cheap as they use to send more shims then that with the T/A , Ya got a stack of paper gskt. mat?riels of different thickness and several metal shim washers that would stack up to .100 after that ya needed a different T/A assy. Because if you had to shim past .100 fourth gear would not engage properly ..
 
Ok. So shim the t/a assembly to get .015 or less, them shim the counter shaft equal to the t/a assembly? I just have a junk it manual that hardly explains anything. I need to get a better manual. Thanks for your thoughts and tips. I really appreciate it.
 
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