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Moses, thanks so much for responding. I’ve actually been following many of your posts and articles regarding tuning up the 2.5 TBI. I will check these posts you’ve listed and see where to go from there and provide feedback to this post. Regarding the 2nd issue (Loud sound) I’m really hoping that it’s what you say such as the driveshafts/splines and NOT my renewed motor or Tranny. The motor still goes on and sounds very smooth and the transmission changes gears smooth also. It makes sense that it is a driveshaft sound and how it Rocks the Jeep. For the first time in 27 years while driving it “kicked” and made a loud metallic sound and I felt as if I ran over some huge hole or rock. I could not tell if the sound came from the motor or transmission. But it jerked enough that my radio popped out of place. I stopped to check but there was no hole or rock. Everything under the Jeep was OK – no leaks, dents or missing axles. I really thought something fell off. But the Jeep kept going and the transmission changed fine and 4 minutes later it did again. Background – the motor was recently rebuilt because there was noise from bad piston rods and a bad blow-by problem. The rebuild was pretty good and the motor goes on nicely and idles at about 950RPM. I would really like to cure issue 1 while issue 2 scares the heck out of me. Here are more details on my setup: All driveshafts are original and there is no lift kit. But my tires are huge! I got them cheap and used along with the rims from a fellow worker. I thought they would look great but I also read that it takes a lot more work for the 2.5 Jeep to move them so I can’t go 5th gear unless it’s a pretty leveled highway. Up hill its mostly 3rd or 2nd gear now. Tire specs are 33 x 12.50 R15 (even though using a tape measure I get under 31” high). I lifted by adding 1.25” shackles and a mechanic who is good at bending leaf springs added 2” by bending the factory leaf springs. Only the rear springs. The rear drive-line length is 18.25” from transfer case to U-bolt and the Angle is about 23°. Is that clear info or do I need to measure differently? Other than that, there are no other modifications to chassis or driveshafts. I don’t think the front driveshaft may have made the noise since I wasn’t in 4x4. Is it still possible? Other things I will be checking are transfer and Axle fluids. I did have a front passenger side fluid leak. I’ve attached a picture of the tire. Thanks for your help.
I am currently in the process of fitting a ford 8.8 with the necessary brackets to fit under the rear of my 01 Jeep TJ. In the interest of keeping cost down, I have decided to simply regear my front dana 30 to match. But before I run out and buy parts, I have a few questions. 1st, is that my rear 8.8 is a 4:10 ratio, and most sets I see for the 30 are 4:10 as well. I have been told that I have to offset my front to a 4:11 for some reason, but no one can explain why. all I've heard so far is that a 1% offset in ratio is "ok". is a matched ratio ok as well? if not, what do I do about this? 2nd, I believe that my current gearing in the D30 is 3:07. it is my understanding that I will have to swap to a different carrier to accommodate the 4:10 gearing. I have found carriers for roughly $100, but they are bare. What do I need in addition to the carrier and R&P in order to install into my housing?