Dobinson leaf springs

[fjc-man]

Sorry about my slow response, for the front there is DOB-HJ45-7L-F 45mm can handle 440 pounds additional weight ( bumper, winch, etc ) and DOB-40-7L-F for stock weight. For the rear there is DOB-TOY-034-R for stock at 45mm lift and DOB-TOY-029-R for 330 lbs additional load. The heavier pairs 30 to 50 bucks more. These are without any bushings, shackles, shocks, u-bolts. I went with the heavier load sets.

 

[wngrog]

Sorry about my slow response, for the front there is DOB-HJ45-7L-F 45mm can handle 440 pounds additional weight ( bumper, winch, etc ) and DOB-40-7L-F for stock weight. For the rear there is DOB-TOY-034-R for stock at 45mm lift and DOB-TOY-029-R for 330 lbs additional load. The heavier pairs 30 to 50 bucks more. These are without any bushings, shackles, shocks, u-bolts. I went with the heavier load sets.

This photo is of the heavy load front and rear with 33x10.50-15?

 

[fjc-man]

This photo is of the heavy load front and rear with 33x10.50-15?

View attachment 2589876

Nolan, yes on the springs. The tires are 31X10.5s

 

[hobbes]

What did you guys torque your shackle bolts to? Dobinson USA told me 90 ft lbs. I asked them to double check that number, and they confirmed it. That seems pretty high. It opens up the split washers.

@crikeymike?

 

[fjc-man]

I think if you used nylok nuts, you could get away with less torque.

 

[hobbes]

I’m fine if the correct answer is 90 ft lbs. The factor specs from the 1971 Chassis Manual are 36 - 58 ft lbs. Just looking for if I should use 50 or 90 ft lbs.

 

[fjc-man]

I’m fine if the correct answer is 90 ft lbs. The factor specs from the 1971 Chassis Manual are 36 - 58 ft lbs. Just looking for if I should use 50 or 90 ft lbs.

What I ment by using the nylok nuts, is that I agree. 90 ft lbs sounds excessive. Think about it, that’s more than the lug nuts.

 

[crikeymike]

What did you guys torque your shackle bolts to? Dobinson USA told me 90 ft lbs. I asked them to double check that number, and they confirmed it. That seems pretty high. It opens up the split washers.

@crikeymike?

I don't have the torque spec of them, sorry. There's a sleeve running through the whole thing, so they'll get maxed out anyway on what "tight" is. I recommend the factory service manual for all torque settings, but it's possible they don't use the same nut and lock washer like Dobinsons do.

 

[crikeymike]

I’m fine if the correct answer is 90 ft lbs. The factor specs from the 1971 Chassis Manual are 36 - 58 ft lbs. Just looking for if I should use 50 or 90 ft lbs.

I would use these factory specs

 

[SteveH]

This appears to be a stock height pair, at a very low cost - am I missing anything? I presume I need the 25mm eye for a '78 FJ40 (smaller eye than later trucks)?

Dobinsons Leaf Spring Pair (HJ40-7L-F) | eBay

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www.ebay.com

 

[fjc-man]

This appears to be a stock height pair, at a very low cost - am I missing anything? I presume I need the 25mm eye for a '78 FJ40 (smaller eye than later trucks)?

Dobinsons Leaf Spring Pair (HJ40-7L-F) | eBay

Find many great new & used options and get the best deals for Dobinsons Leaf Spring Pair (HJ40-7L-F) at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Steve, those are the Dobinsons I have on the front of mine. 45mm lift. I went with the 50mm (DOB-TOY-029-R) on the rear. 610.00 for both pair. Oops, correction. DOB-HJ45-7L-F on the front.

 

[SteveH]

Looks nice. I don't want a lot of lift, since I have 33x9.5s on my truck. From whom did you buy them?

 

[fjc-man]

Steve, I bought them from @amfindustrialusa.com their in Miami, Florida. Their website is a little wonky to navigate, if you have difficulty call them at 1-786-292-7750. Oh, and free shipping.

 

[JVZii]

Here is my rig with lite duty Dobinsons.

I think these ride well however my cruiser lean was still present after I put the new springs on. I even swapped the springs to make sure (no luck). I think the lite duty is more sensitive to weight. If you have some lean you might get the heavy duty at least for the backs. Or maybe one of each?

 

[wngrog]

I put a set on a 45 and on my 60. Pleased with them.

 

[merbesfield]

What bushings and shackles did you guys go with?

 

[merbesfield]

I put a set on a 45 and on my 60. Pleased with them.

View attachment 2696491

View attachment 2696493

Nolan, light duty or the slightly lifted version springs? Specifically the 45.

 

[wngrog]

Nolan, light duty or the slightly lifted version springs? Specifically the 45.

The 45 had one option. Sits great.

 

[mdawg]

Curious... what is the consensus on which Dobinson's rear spring option is needed for a '79 with a hardtop and OEM tire carrier?

I just got the IMS suspension kit that includes the TOY-34-R rear spring (medium load), but wondering if I also need the Add-a-Leaf option to stiffen up the rear due to the weight of said hard top and tire carrier. Thoughts?

 

[fjc-man]

If I remember correctly TOY-034-R is 6 leafs and I went with TOY-029-R which is 7 leafs. 290.00 for the rear 4 1/2 years ago. Pictured on 31” tires.