• To ALL forum users - As of late I have been getting quite a few private messages with questions about build ups here on the forum, or tech questions about your personal project. While I appreciate the interest, sending me a private message about these topics distracts from, and undermines the purpose of having a forum here. During the day I wear many hats as a small business owner-operator and I work tirelessly to provide the absolute best service possible to you, our valued customer. When I created this forum I rounded up some of the best minds I knew so that any tech question you might have could be asked and answered by either myself or one of my highly experienced moderators, this way the next time this same question is asked the answer can be easily found and utilized by the next IH enthusiast having the same question. This allows me the freedom to run the day to day operations of the business and minimize the impact to shipments and shop activities that these distractions can cause. It is of the up most importance for me to complete the daily tasks in order to best take care of you our customer, all the while providing you a forum to get the level advice and input you have come to expect and deserve from the premier IH shop in the country.

    So with that I ask that anyone with a question about one of our build ups or a general tech question to please use the forum as it was intended. I am absolutely available by telephone to answer your questions as well but at times may direct you back to our website to better field your question or questions. Most other private messages I will be glad to answer for you.

    Thank you for your understanding.

    Jeff Ismail

'74 scout ii


New member
Newbie that needs some direction on what may have caused the driveshaft to get twisted and break.

Details about the scout are attached.

I had noticed transfluid leaking for a month or so but the dipstick always read a good level.

Had it out today and was coming to a stop and the rpms were so high I had to use two feet to make it stop. At the light, I went to put it in neutral because it was revving high and as soon as I did, the driveshaft snapped. From inside it sounded like the flywheel was clanking. Pulled it over and noticed the twisted and snapped driveshaft.

I can fix a driveshaft but clearly something else is happening. Where should I start with diag?





New member
Edited - I had high rpm issues due to the gas pedal getting stuck so I'm guessing applying the brakes while it was engaged may have cause the issue. I was more concerned with stopping before hitting the car in front of me than lifting up on the pedal. It's a new carb and rebuild trans and I wonder if the linkage and cable are the issue.
Someone screwed up on the rear spring install and added shims that are making the pinion point up way too high for your set up. You need equal and opposite angles at the pinion and the transfer case yoke. Otherwise the way you have it now, it needs a double cardan driveshaft.