bg-royaltz Posted March 3, 2014 Report Share Posted March 3, 2014 OK..starting my 620 build. I have the tools, I have the workspace. Got the money, now I need the help. I am building a sr20det swapped, triangulated 3 linked, bagged, with a custom built front suspension. I have ordered all the metal for the new frame. I want to mate the tranny to a ford 9" rear. I need to know what length rear, and all the little details to make this work. Not too concerned with third member specs but will take input. I want to fit some bigger wheels. I'm guessing 18's, maybe 8-9" wide. So should I get a rear that is 40". That opens the door for a wide wheel range. The details i also need are in bolt pattern, spline, pinion offset.... Please refrain from criticism. I want and need the help. No better place than this forum. All help will be recognized. Quote Link to comment
datzenmike Posted March 4, 2014 Report Share Posted March 4, 2014 OK..starting my 620 build. I have the tools, I have the workspace. Got the money, now I need the help. I am building a sr20det swapped, triangulated 3 linked, bagged, with a custom built front suspension. I have ordered all the metal for the new frame. I want to mate the tranny to a ford 9" rear. I need to know what length rear, and all the little details to make this work. Not too concerned with third member specs but will take input. I want to fit some bigger wheels. I'm guessing 18's, maybe 8-9" wide. So should I get a rear that is 40". That opens the door for a wide wheel range. The details i also need are in bolt pattern, spline, pinion offset.... Please refrain from criticism. I want and need the help. No better place than this forum. All help will be recognized. . Maybe a Ford truck forum would have that info. The stock H-90 rear end is good for almost 300 ft. lbs. of torque. The H-233 from the D-21 Hardbody and WD-21 Pathfinder is even larger than the Ford 9" and there are 4.375 and 4.625 ratios with LSD. has the same rim bolt pattern as the 620. Quote Link to comment
bg-royaltz Posted March 4, 2014 Author Report Share Posted March 4, 2014 Thanks for the reply. I have taken this route into consideration. I will also save a few bucks as well. I was opposed to having 6 lug, but I can manage. Now for a few details. I am looking for a pathy rear? What would an ideal gear ratio be having the sr20det as my powerplant. I see some for sale that say disc brakes, non locking, MT...is this what I'm looking for Quote Link to comment
datzenmike Posted March 4, 2014 Report Share Posted March 4, 2014 I got a 4.625 LSD and rear disc brake from a Pathfinder but it was coil and 4 link. Ground all the mounts off and was going to weld leaf spring perches on. I don't think the D-21 Hardbody had rear disc though. Pathfinder and Hardbody have engine tags under the pass side hood hinge on the inner fender that display what differential was installed. Here's one from a D-21. Look in the lower right corner. HG is the H-233 axle and 46 is 4.625 ratio... a HG43 would be a 4.375 and so on. It does not list if it has LSD here. For that use a rag and wipe the dirt of the rear side of the third member. If LSD is installed there will be a small orange tag. The LSD is a 4 pinion type. The D-21 axle would be easier to convert to a 620 than the Pathfinder. I suspect that the Pathfinder rear axles with the disc brakes will fit the Hardbody axle tubes. Research this as early axle splines changed around '95 ish. D-21 and WD-21 H-233 differentials are just short of 9 3/16" diameter. Quote Link to comment
bg-royaltz Posted March 5, 2014 Author Report Share Posted March 5, 2014 OK..when you say the d21 is easier to convert.. I don't understand. I will be doing a triangulated 3 link in the rear of the 620. I just need a rear that will hold up to the sr20det. A LSD, and disc brakes will also be required. I will have to narrow the rear to accommodate the size of rims I want. I assume I can just narrow the pathy rear, get custom axles, weld on my link tabs and be good to go. I am new to all of this, so I really want to make sure I have a solid rear, stopping power, and proper ratio so I can get all the power out of the sr Quote Link to comment
datzenmike Posted March 5, 2014 Report Share Posted March 5, 2014 Sorry, the WD-21 Pathfinder will have all those things you need I thought you were running leaf and the D-21 Hardbody already has that. Quote Link to comment
bg-royaltz Posted March 5, 2014 Author Report Share Posted March 5, 2014 OK...cool. Thanks alot. Now the search begins. Quote Link to comment
hosestop@msn.com Posted March 5, 2014 Report Share Posted March 5, 2014 Hey out there in rear end land ,I thought pathfinder and hard body trucks are wider than 620 ,what is a 620 outer drum to outer drum ,I am going to measure up h190 on 521 and roadster and get back to you . Quote Link to comment
datzenmike Posted March 5, 2014 Report Share Posted March 5, 2014 They are wider than the 720 and it's wider than a 620. I think the Pathfinder is about 160" Quote Link to comment
bg-royaltz Posted March 10, 2014 Author Report Share Posted March 10, 2014 OK. Well I was only able to locate a h233 with disc and locker. No LSD. 300.00 bucks. I guess it is in by best interest to keep looking. Quote Link to comment
bg-royaltz Posted March 11, 2014 Author Report Share Posted March 11, 2014 How does a ford 8.8, 3.73 gears w/ LSD sound. Will this work for my application. And since the Center section is offset to the passenger side, I can narrow it appropriately to have it centered. Quote Link to comment
datzenmike Posted March 11, 2014 Report Share Posted March 11, 2014 Well that's only half an inch larger than the H-190 in it now that fits, plus it's not 6 bolt rim. It does have LSD though Quote Link to comment
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