73 pick em' up Posted January 27, 2010 Report Share Posted January 27, 2010 i just got this truck no more than a week ago and as i was driving it it got jammed in 3rd gear do you guys know of a replacement trans that could go in with no modification i though i found one off of a 74 620 but it was too long of a trans Quote Link to comment
bob72gts Posted January 27, 2010 Report Share Posted January 27, 2010 i just got this truck no more than a week ago and as i was driving it it got jammed in 3rd gear do you guys know of a replacement trans that could go in with no modification i though i found one off of a 74 620 but it was too long of a trans If this is not your daily driver I can help you out. I have the transmission you need in storage in Fontana CA. It came out of a very clean 104k mile truck about 10 years ago and has been sitting inside since then. It will be a month or two before I can get out there. Send me an email Bob72gts@aol.com Quote Link to comment
datzenmike Posted January 27, 2010 Report Share Posted January 27, 2010 Get the '74 trans and the front half (or all) of the driveshaft. The '74 should have a slightly shorter drive shaft. Pretty sure this will work, but don't quote me.... measure everything first. I think you will find the difference in the tranny lengths will be a little over 5". The '74 drive shaft length back to the first U-joint should be about 5" shorter than your '73. Longer tranny + shorter drive shaft = fixed. Quote Link to comment
73 pick em' up Posted January 27, 2010 Author Report Share Posted January 27, 2010 would all the mounting points be the same or wold that have to be modified Quote Link to comment
datzenmike Posted January 28, 2010 Report Share Posted January 28, 2010 Good point. The tranny mount might be different. Grab the '74 cross member that the tranny mount bolts to. It might bolt into the earlier truck. You may only need to drill new holes or reposition it. Quote Link to comment
mike Posted January 28, 2010 Report Share Posted January 28, 2010 Im not 100% sure on this but check the e-brake cables too, I think there are differences between the pre/post 73 620s. Quote Link to comment
datzenmike Posted January 28, 2010 Report Share Posted January 28, 2010 The cables won't be changed just the transmission and drive shaft. Quote Link to comment
DatDoug Posted January 28, 2010 Report Share Posted January 28, 2010 Either get a tranny out of another 73 or Like Mike said grab the tranny out of the 74 along with the WHOLE driveshaft, CROSSMEMBER (will bolt rite up to existing holes) & top plate in the interior. If you have the time & money you should upgrade to a 5 speed. Mite as well put in a new clutch kit too while your @ it. Quote Link to comment
lilhustler521 Posted January 28, 2010 Report Share Posted January 28, 2010 I have a 74 620 i will be parting out, you can get all the parts you need from me. PM me if your interested Quote Link to comment
73 pick em' up Posted January 28, 2010 Author Report Share Posted January 28, 2010 would a 720 tranny work or is that a complete different set up Quote Link to comment
Roadracer Al Posted January 28, 2010 Report Share Posted January 28, 2010 No relation to the seller: http://sfbay.craigslist.org/eby/pts/1571395701.html Quote Link to comment
datzenmike Posted January 28, 2010 Report Share Posted January 28, 2010 would a 720 tranny work or is that a complete different set up Only if it is a 1980 720. Quote Link to comment
73 pick em' up Posted January 28, 2010 Author Report Share Posted January 28, 2010 No relation to the seller: http://sfbay.craigsl...1571395701.html i had this five speed dog leg this is the one that got stuck in 3rd they charge me 650 for a rebuild has your tranny been rebuild or is it still all origional Quote Link to comment
73 pick em' up Posted January 28, 2010 Author Report Share Posted January 28, 2010 I have a 74 620 i will be parting out, you can get all the parts you need from me. PM me if your interested how much would you want for the tranny, cross member, and drive shaft Quote Link to comment
73 pick em' up Posted January 29, 2010 Author Report Share Posted January 29, 2010 what type of cam upgrades are available for the L20 b engine and what kind of carburetor set up can be done on this engine Quote Link to comment
Roadracer Al Posted January 29, 2010 Report Share Posted January 29, 2010 Not my trans, no relation to the seller --- contact seller via CL. i had this five speed dog leg this is the one that got stuck in 3rd they charge me 650 for a rebuild has your tranny been rebuild or is it still all origional Quote Link to comment
datzenmike Posted January 30, 2010 Report Share Posted January 30, 2010 No relation to the seller: http://sfbay.craigsl...1571395701.html "Shifts smoothe in all gears and synchroes $550. This trany is preferred by Datsun enthusiast and are said to be bullet proof." Bullet proof is a relative term. This tranny is adequate for an L20B and is better suited for an L16 size motor. There's a reason it wasn't used in the truck L18s and L20Bs. The longer FS5W71B is much stronger and is used in the 620 trucks with L20Bs and also in the 280z and zx (non turbo) Once converted over to the long tranny you can find replacements from any '77-'83 280z/zx. '79-'84 Maxima gas or diesel, '77-'79 620 or the '80 720 trucks. Lots of different ratios and over drives to choose from. For $550 I would want re-build receipts. For used, this is high. Quote Link to comment
73 pick em' up Posted January 30, 2010 Author Report Share Posted January 30, 2010 the one that i have has 63a casted on the side is this at all a good tranny Quote Link to comment
datzenmike Posted January 31, 2010 Report Share Posted January 31, 2010 If it has a smooth bell and case and has a shifter like this, it's an FS5W63A dogleg 5speed: If it has a bottom bolt on pan and looks like a waffle on the main case and this typr of shifter you have a stock early 620 F4W63 4 speed tranny: Bottom tranny The FS5W63A and the F4W63 are both are 63 series transmissions and may say so on the casting. . Quote Link to comment
73 pick em' up Posted January 31, 2010 Author Report Share Posted January 31, 2010 well mine had the dog leg shifter and it was a smooth bell and case finally got my tranny for 550 fully rebuilt should have truck running tomorrow morning thank you for all your help much appreciated only one question should the pilot bearing be lubed or not Quote Link to comment
datzenmike Posted January 31, 2010 Report Share Posted January 31, 2010 The pilot bushing in the end of the crankshaft can go in 'dry'. It's made if sintered bronze and is impregnated with oil so good to go. A new release bearing on the clutch arm will need to be packed with grease. Take a handful of bearing grease and work the bearing into it in a scooping motion with the other hand forcing the lube into the bearing cavities. Wipe off excess grease and install on bearing housing. The housing that the bearing presses onto on the clutch arm also has a shallow cavity that should be lightly filled with a lithium base grease. Use a light coat of this lithium grease on the transmission input splines, the pivot ball on the transmission and the fork ends where the release bearing clips on. Don't forget a dab on the very end where the slave cylinder rod contacts the clutch arm. Quote Link to comment
73 pick em' up Posted February 1, 2010 Author Report Share Posted February 1, 2010 thank you my truck is now running and i couldn't be happier viva mi trocka BROWN PRIDE Quote Link to comment
datsun dreamer Posted February 1, 2010 Report Share Posted February 1, 2010 thank you my truck is now running and i couldn't be happier viva mi trocka BROWN PRIDE Pictures please :D ! Quote Link to comment
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