Rear Suspension Torque Specs

[R.J.]

MY 2021 and can't find a service manual yet. I'm sure it's the same as prior years so waiting for release.

I need the specs for the leaf spring bolts front and rear including the shackles and U-Bolts.

 

[R.J.]

Anyone got a list or a worksheet dealing mostly with the front and rear suspension specs?

 

[Scooter29]

I dont know what ram says but I just installed Torklift frame mounts for my camper and it required backing out the front leaf spring bolts. Their instructions said to torque to 350ftlbs

 

[Rockcrawlindude]

 

[BighornHDRam]

Here's from the service manual MY19 My20

 

[R.J.]

Here's from the service manual MY19 My20

Hey thanks so much!

 

[newmason]

I dont know what ram says but I just installed Torklift frame mounts for my camper and it required backing out the front leaf spring bolts. Their instructions said to torque to 350ftlbs

I just installed the same tie downs on my 2022 (same as the 2021) Only finished 1 front as trying to get that front leaf spring bolt to break loose was tough! Did you get it retorqued to 350 after the install? My torque wrench doesn't go that high!

 

[R.J.]

I just installed the same tie downs on my 2022 (same as the 2021) Only finished 1 front as trying to get that front leaf spring bolt to break loose was tough! Did you get it retorqued to 350 after the install? My torque wrench doesn't go that high!

I used a 3/4" drive monster torque wrench with a 3/4" to 1/2"adaptor and 30MM socket.

I have a 1/2" drive torque wrench that will only go up to 300 Ft. Lbs., If this is all I had, I would torque to 300 and give it another 1/8-1/4 turn with a breaker bar and call it good. The bolt is so tight, I'm not sure being super accurate is going to be an issue.

 

[newmason]

I used a 3/4" drive monster torque wrench with a 3/4" to 1/2"adaptor and 30MM socket.

I have a 1/2" drive torque wrench that will only go up to 300 Ft. Lbs., If this is all I had, I would torque to 300 and give it another 1/8-1/4 turn with a breaker bar and call it good. The bolt is so tight, I'm not sure being super accurate is going to be an issue.

I don't understand why that bolt has to be so tight in the first place, at 150 ft pounds it was tough to even get another 1/8th of movement out of the bolt

 

[newmason]

Were you also able to get them torqued on the ground or did you have a lift?

 

[R.J.]

Were you also able to get them torqued on the ground or did you have a lift?

The rear bolt is 315 Ft Lbs. (I think)

No, I used 4x4 blocks under each tire so I could get more leverage. If you have access to a lift, it will be much easier so you can get some weight behind it.

 

[Scooter29]

I just installed the same tie downs on my 2022 (same as the 2021) Only finished 1 front as trying to get that front leaf spring bolt to break loose was tough! Did you get it retorqued to 350 after the install? My torque wrench doesn't go that high

No I just got them good and tight. They are a pain to loosen and tighten. Not to mention there’s a little play in the mount and I had to loosen the leaf spring bolt again to move the mount for the bolts to line up. I had to jack the truck up and put jack stand under the hitch to give my breaker bar clearance from the ground. Then laid on my back and used some leg strength to get it nice and tight. I marked all my bolts with paint marker and haven’t seen any movement since.

 

[newmason]

No I just got them good and tight. They are a pain to loosen and tighten. Not to mention there’s a little play in the mount and I had to loosen the leaf spring bolt again to move the mount for the bolts to line up. I had to jack the truck up and put jack stand under the hitch to give my breaker bar clearance from the ground. Then laid on my back and used some leg strength to get it nice and tight. I marked all my bolts with paint marker and haven’t seen any movement since.

What's the reason for such a high torque value on these bolts?

 

[Scooter29]

No clue on specifics other than it’s a key point where the rear suspension is secured. With that it makes sense why torklift used it as a point for their frame mount. Lots of strength there.

 

[Rockcrawlindude]

Because the bolt doesn’t support the weight of the truck. You have to sandwich the bushing lining sleeve with enough torque to hold it in place. It’s a clamping bolt. This is how all vulcanized bushings work