bluebird4200 Posted August 1, 2015 Report Share Posted August 1, 2015 I know some of you guys installed the 4x4 720 leaf springs. Can you guys send me in the right direction of some of these installs in these Ratsun forums? 1 Quote Link to comment
red13 Posted August 1, 2015 Report Share Posted August 1, 2015 Remove your old ones and install those 1 Quote Link to comment
bluebird4200 Posted August 1, 2015 Author Report Share Posted August 1, 2015 Easy as that aye? With 3 inch blocks should sit nice on 16"s. No fabrication? 1 Quote Link to comment
5t341tH Posted August 1, 2015 Report Share Posted August 1, 2015 There's a howto section with this.... 1 Quote Link to comment
datzenmike Posted August 1, 2015 Report Share Posted August 1, 2015 Using the search function, I typed 720 springs onto a 620 and got this.... http://community.ratsun.net/topic/57051-dawas-720-leaf-springs-into-620-swap/ It took me three times longer longer to write this post. Don't be lazy... try it yourself. This swap is well documented and there are more answers. 1 Quote Link to comment
datzenmike Posted August 1, 2015 Report Share Posted August 1, 2015 Feed a man a fish and he'll be hungry by tomorrow. Teach him how to fish and .... 1 Quote Link to comment
bluebird4200 Posted August 1, 2015 Author Report Share Posted August 1, 2015 Took half of the day, but I found some..Not to lazy today Mike! 1 Quote Link to comment
5t341tH Posted August 2, 2015 Report Share Posted August 2, 2015 which yard did you find it at? I never see anything good at the stanton or anaheim one Quote Link to comment
red13 Posted August 2, 2015 Report Share Posted August 2, 2015 there was some in hesperia junkyard Quote Link to comment
bluebird4200 Posted August 3, 2015 Author Report Share Posted August 3, 2015 I found the set at japanese truck dismantling in Wilmot . Quote Link to comment
bluebird4200 Posted August 3, 2015 Author Report Share Posted August 3, 2015 I don't think they have anymore, but none the less a good source Quote Link to comment
bluebird4200 Posted September 6, 2015 Author Report Share Posted September 6, 2015 my bad..here you go 1 Quote Link to comment
datzenmike Posted September 6, 2015 Report Share Posted September 6, 2015 Just so you know ... you can go back and edit your old posts. For editing the title, (usually sp. mistakes) select Full Editor. Looks nice. The 4x4 are firmer so less chance of bottoming and the lower center of gravity will enhance handling and braking. Quote Link to comment
bluebird4200 Posted November 27, 2015 Author Report Share Posted November 27, 2015 I forgot to post a picture after the new 4x4 leafs with new wheels and tires. 1 Quote Link to comment
sebpv Posted November 27, 2015 Report Share Posted November 27, 2015 Dayum...Now I dunno what color I wanna paint my truck. THANKS!... I wanted to go all out on pearls and stuff but dont wanna mess up my FIRST paint job. Deciding between stock green, red, orange, black, grey, white or even that Taiwanese light blue truck on the internet... With the last picture you can almost guess a hint of dark blue paint. Quote Link to comment
datzenmike Posted November 27, 2015 Report Share Posted November 27, 2015 Proof that you don't have to ruin the looks of the truck with bling rims. Quote Link to comment
gene knight Posted November 27, 2015 Report Share Posted November 27, 2015 I have a set of 720- 4x4 leafs springs on my king cabs and 521 Quote Link to comment
5t341tH Posted January 23, 2021 Report Share Posted January 23, 2021 Hey wanted to bump this old thread. Anyone know how to tell 720 4x4 leaf springs from the stock 620 ones? I bought a set of supposed 720 4x4 ones and they look identical to my 620 ones on the truck. It has two curved leaves and one straight on the bottom Quote Link to comment
datzenmike Posted January 23, 2021 Report Share Posted January 23, 2021 from the '84 FSM 2wd.... two curved 7mm thick, one flat and 13mm thick. 4wd.... two curved one 7mm one 8mm thick and flat one 12mm thick The big difference is the free camber. Hold a string through the center of the bolt holes and measure down to the top of the leaf..... 2wd is 6.34" 4wd is 3.68 ..... much flatter Spring rate (stiffness, load carrying) 2wd....... 310 pounds per inch 4wd....... 548 pounds per inch Quote Link to comment
5t341tH Posted January 24, 2021 Report Share Posted January 24, 2021 9 hours ago, datzenmike said: from the '84 FSM 2wd.... two curved 7mm thick, one flat and 13mm thick. 4wd.... two curved one 7mm one 8mm thick and flat one 12mm thick The big difference is the free camber. Hold a string through the center of the bolt holes and measure down to the top of the leaf..... 2wd is 6.34" 4wd is 3.68 ..... much flatter Spring rate (stiffness, load carrying) 2wd....... 310 pounds per inch 4wd....... 548 pounds per inch thanks mike. I guess I bought stock 620 leaf springs Quote Link to comment
datzenmike Posted January 24, 2021 Report Share Posted January 24, 2021 Might be 720 2wd. Are you after stiffer? lower? or both? Quote Link to comment
5t341tH Posted January 26, 2021 Report Share Posted January 26, 2021 On 1/24/2021 at 7:13 AM, datzenmike said: Might be 720 2wd. Are you after stiffer? lower? or both? I am after stiffer. Lower could be nicer too so I can remove the 4" blocks and just use 3" instead Quote Link to comment
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