Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #25 – July 16, 2017, 09:20:07 am Can you take your Chunk to a gear shop and have them put a pinion gear in it? Check out the proformancepros link they have different ratios!Rockwell F106 Rears (Rear) on HeavyTruckParts.NetMeritor F106 Ring Gear and Pinions on VanderHaags.comF106 5.83 Ratio Ring and Pinion with Bolt Kit A36162-1 PRT-006 | eBayhttps://www.proformancepros.com/cgi-bin/commerce.cgi?preadd=action&key=ZBG-F106 Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #26 – July 17, 2017, 09:40:08 pm Thanks for the links, HeavyTruck did not have one and the others didn't seem to have axle ratios in the 4. something. Hoping to find one out of some old truck, military truck or foretravel. The military had a 4.33 ratio and last April a guy said he had four but he doesn't answer now. Bummed I added more pics to my post. Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #27 – July 18, 2017, 08:05:59 am Look Here Search - LKQ Heavy Truck Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #28 – July 18, 2017, 08:11:41 am Goodys LKQ Truck Parts Toledo Oh 800-537-8690 Tag#993353Call this number and give them that tag number Showing a 4.62 Ring and pinion for a F106 Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #29 – July 18, 2017, 12:16:28 pm Thanks for the search. I called and the lady was great she said it was #993253. For $500. I don't think I could rebuild the unit. I don't have the knowledge or tools or place. I really like to find the dif. center used. Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #30 – July 18, 2017, 03:17:16 pm I found a obsolete meritor page with the F106 ratios. They had fast ratios of 4.63 and 4.88 and standard ratios starting at 5.29 through 7.80.I feel finding a complete chunk with the 4.88 or the 4.63 is going to be like finding a Unicorn.Personally if I were in your shoes and this 4.63 set ,which you said you wanted a little more top speed is correct for your diff. I would find a gear shop or maybe even the local Vo Tech school and see if they can set it up for you. The internals in your chunk bearings etc should be good. That's just my opinion this high gear ratio does not come up doing searches. Plenty if 7 stuff but no 4 stuff.Another thing is if you were to find the Unicorn. If your luck is like mine it would be on the other side of the country and the freight charges for the heavy thing would probably break the bank. Something to think about. I'll keep my eyes open for your Unicorn. Good Luck! Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #31 – July 18, 2017, 07:51:31 pm Thanks for the research. There must be some burned out 1980's Foretravels somewhere. Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #32 – July 18, 2017, 10:27:17 pm The odds are zero. Maybe fifty made 35 years ago? Not that it does not exist but finding it?Be real. Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #33 – July 18, 2017, 10:44:33 pm Call and check with these guys. I bought a differential from them when I swapped mine from 5.13 to 4.33 Mine is a merritor, I paid like $400VanderHaags.com - Truck Parts and Accessories Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #34 – July 19, 2017, 02:00:31 am I'll try. Did you change the whole differential or just the center? Quote Selected
Re: 1982 38' Foretravel broken differential pinion and free 1982 repair manual pd Reply #35 – July 19, 2017, 11:16:39 am Quote from: Step – July 19, 2017, 02:00:31 amI'll try. Did you change the whole differential or just the center?The whole 3rd member is one piece. Pull axles and it drops out. Pictures here: Rear end gear change from 5.13 to 4.33 on 8.3 Cummins u270 Quote Selected