DavNova Posted June 19, 2021 Report Share Posted June 19, 2021 Recently bought this, identied as a h190, possibly with r180 plates. Full album: http://imgur.com/a/WdOsYmw Have a 79 620 rear end I'm wanting to put this into. (SR20 powered) Didn't know if anyone had any information if this was indeed a nismo unit or not, and if I shouldn't use these possible r180 plates? Maybe use r200 plates instead? Also saw in other threads a spacer might be needed for the bearings. Any help or advise is appreciated. Quote Link to comment
datzenmike Posted June 19, 2021 Report Share Posted June 19, 2021 Count the side gear splines. Should be 29 for trucks. This isn't a Nissan LSD by the looks of it although the plates and clutches do. Quote Link to comment
DavNova Posted June 20, 2021 Author Report Share Posted June 20, 2021 Yes 29, initial torque is said to be 22-23 lbs, which seems to be low. Quote Link to comment
datzenmike Posted June 20, 2021 Report Share Posted June 20, 2021 That's what the soccer-mom's later Pathfinders were. They didn't like the chirping hopping tires turning corners on pavement in a 'truck' that never saw a dirt road. So Nissan trimmed 100 pounds off the break away force. Quote Link to comment
DavNova Posted June 20, 2021 Author Report Share Posted June 20, 2021 I'm reading up on shimming to increase, there seems to be a wide range of opinions on streetable torque numbers. Some say 45, 75 or up to 100. I may try 60ish as long as it all fits with no issues. Quote Link to comment
datzenmike Posted June 20, 2021 Report Share Posted June 20, 2021 Weight and traction are important. Has to be enough of both to overcome the clutches so they slip and uncouple when making a turn. Too much break away needed and you may as well weld it solid. Too little and there isn't enough lock up to be effective in a straight line. The '88-'93 D21 Hardbody had a CLSD option. If you can find a factory service manual on line it would show how to check the break away torque with a torque wrench for a 2wd truck. The Hardbody would be similar to the 620. If you don't mind pulling the differential apart to get what you want I guess this won't matter. I had an '82 Grand Prix Pontiac with LSD. It was un-noticable when driving around town on pavement, very light setting. On soft surfaces like sand, mud/dirt or snow both wheels would spin. 1 Quote Link to comment
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