1987 2.9L to a 1991 4.0L

[Josh B]

Happy to meet you Spider. You will get good answers here, just can't say when, but you will be happy you waited when you get them
Good luck with it man

 

[Greenasspider]

Happy to meet you Spider. You will get good answers here, just can't say when, but you will be happy you waited when you get them
Good luck with it man

Thanks Josh B , nice to meet you as well. I haven't been on here much recently . my truck has been out of commission for about three years . Just getting to the swap . Have everything I THINK I'll need . I learned when I got this truck 17 Years ago to research well ahead of time before starting anything , and to just take my time , solve each issue as it comes up . Always Happy to communicate with other Ranger Enthusiasts .

 

[gaz]

Hi , currently in the middle of swap . 87 supercab 4x4 . 2.9L ,out , dash out . Firewall stripped inside and out . Front clip removed. Installing , 2006 4.0 L SOHC .
Donor cab , dash firewall is 2003. I see where the brake , clutch pedal assemblies will be an issue for installing the new dash .
The question i have today is . clutch and flywheel for 4.0 L , will this mate up to transmission , bell housing , stock from 2.9L ? The bell housing will bolt to the engine , the splines and pilot on the input shaft are the same, but the distance to release bearing doesn't seem to measure up . Has anyone done this ? Or is there another clutch that will work ? The flywheel thickness is the biggest difference . Can someone please tell me the thickness of the 2.9L flywheel for manual transmission as i no longer have it .

Please look at the TECH PAGE article on 4.0l clutch to 2.9l. It will need the 4.0l starter plate and an OHV 4.0l starter.

 

[Greenasspider]

Thank you gaz , that tech article was a little helpfull . I have a 4.0L SOHC engine and am trying to keep the FM 146 transmission , but use the 4.0L clutch . Wondering if this works ? I know the bell housing will fit , bolt up to the block .

 

[bobbywalter]

Thank you gaz , that tech article was a little helpfull . I have a 4.0L SOHC engine and am trying to keep the FM 146 transmission , but use the 4.0L clutch . Wondering if this works ? I know the bell housing will fit , bolt up to the block .

it can work....but its not going to like ass whoopinz.

 

[gaz]

Thank you gaz , that tech article was a little helpfull . I have a 4.0L SOHC engine and am trying to keep the FM 146 transmission , but use the 4.0L clutch . Wondering if this works ? I know the bell housing will fit , bolt up to the block .

If your 4.0l is stock and from the 91, it is not the SOHC version, it is the OHV version...either of which will bolt right onto your FM146 with a 4.0l clutch, clutch plate and 4.0l starter but as @bobbywalter stated, it will not hold up to the 4.0l's torque, at least don't expect an extended, happy relationship.

 

[Greenasspider]

Thanks for the replies .

 

[Greenasspider]

I posted my question under the wrong discussion / thread . the engine is 2006 , and is a SOHC . Thanks for pointing that out . I know correct identification is key to getting the correct info .