In a way YES Phil (imo): Big Red explains that also F tacho's get ripped ... it is to me just a piece of good info ! Had never thought about that, but yes ... it is just a car .....
I'm going to ship my broken carrier and side cover out to dave tomorrow for free on the promise that he will post pic's of the broken parts for all to see the damage that can happen. Michael
A slight correction, the non-welded differential (-M Type) was installed in the 512TR from JULY 1994. This info is taken from the Ferrari Service Bulletin screen print in another diff thread.
I will post photos when I receive it. I would like to examine it and maybe show it to a weld failure expert to see if it was faulty weld or maybe too much machined away after weld. Thanks again to Michael. Ago
Yes, but your car was only 13 years old or so when you bought it. Not 25 years old with low miles. To me it is all about condition regardless of miles. Regardless, some are screwed together better than other when you are talking about small production runs. I'm sure you have kept up with the service as well. If you follow ferraris mait schedule, it is hard for a for something to go wrong, as the parts get replaced way before they go bad, as you well know. Having had my 308 for 13+ years, and never suffering from any real bad events in 20K+ miles. A good car is a good car, if taken care of.
I don't think that the date mentioned in the SB is correct. My car (#98932) was delivered on March 25th 1994 and was already fitted with a non-welded differential. My gearbox number is 2178. Perhaps "1/7/1994" refers to January 7th 1994??
Car had just over 40k miles. Started with leaking differential seal (or so we thought, side carrier was obviously cracked), and devolved into what follows. Thankfully ring and pinion were miraculously unharmed by the shrapnel. Just thought it would be worth mentioning as an additional data point for those who are keeping score. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
1/7/1994 is in europe ( or even most countries of europe ) 1st of july 1994, of course it is so in italy
We are a service and restoration facility, it was repaired in house by our techs with a Modena Engineering Differential and the side carrier was sourced from GT Car Parts in AZ. Dana 60 shims worked perfectly as has been noted in other threads.
Is the Modena Engineering diff another source for the TR diff replacement? Would that make three? Ago
I dont know about the other two.But i bought newmans <pauls> diff and it was a real work of art..it was just a drop in.Not only that but i phoned paul a few times and he was very helpful with any questions i had. +1
I have a good unit here, if you want to compare the 2. I will need it back however, customer wants it for a paper weight..let me know..
You may be correct that the dates are "Euro" style and 7/01/94 would equate to January 7, 1994. Based on the gear box number progression in the SB's below I'm not sure how your gear box, 2178 would fall in. Item 6, SB 30-22, 03/07/94 (July 3, 1994?); 512TR starting with gearbox number 1797 ...or is the date actually March 7, 1994
See item 7 NOTES: All of the gearbox numbers are for 512TR's, none for TR's. Don't confuse assembly numbers for gearbox numbers. NOTE THE SEQUENCING OF DATES THROUGH THE SERVICE BULLETINS. NOTE THE GEAR BOX NUMBER PROGRESSION (and related dates) THROUGHOUT THE SERVICE BULLETINS. See SB 30-23, 7/01/94 If you have gear box number 1370 or later you are a lucky guy. The info below was pulled from an older thread in 2007 ******************************************************************** 1. SB 30-16, 06/01/92; applies to 512TR and F-40 Casehardened ring nut starting with 512TR Gearbox no. 385 a. Lay & Trans shaft ring nut, replace 100729 with 150918 b. Clutch shaft ring nut, replace 125500 with 150304 c. Main shaft rear ring nut, replace 105764 with 150920 d. Main shaft front ring nut, replace 104713 with 150921 2. SB 30-17A, 03/07/94; applies to 512TR, 348, & Mondial Ring nuts for gearbox shafts for 512TR starting with assembly number 10970 (this is a different number than the gearbox number & is found on a plate between the right fuel filter & the rubber air induction hose. a. Ring nut fixing driven gear on front of secondary shaft replace 150918 with 153068 & increase torque from 220 Nm to 280 Nm b. Ring nut for clutch shaft replace 150304 with 153066 & increase torque from 160 Nm to 220 Nm (Note: This is another change from SB30-16) c. Ring nut on rear of primary shaft replace 150920 with 153067 & increase torque from 220 Nm to 280Nm d. Ring nut on front of primary shaft replace 150921 with 153060 and increase torque from 220 Nm to 280 Nm (Note: Another change from SB30-16) e. Ring nut on front of primary shaft replace 151834 with 153060 and increase torque from 220 Nm to 280 Nm 3. SB 30-18, 12/20/93 applies to 512TR (shaft can also be used in 512BB & Testarossa) Propeller shaft from transfer gearbox back of clutch to main transmission. New heavier shaft starting with engine number 31108. Replace 151653 (17mm dia.) with 151651 (20mm dia.) 4. SB 30-20, 03/07/94; 512TR starting with gearbox number 1749 Introduction of an oil feed line between gearbox case & clutch bell housing to improve lubrication of the transfer gears. I won't list all part numbers unless someone specifically wants them as it involves a new bell housing and new gear box case plus other smaller parts (very, very expensive & probably not worth it) 5. SB 30-21, 03/07/94; 512TR starting with gearbox number 1086 A new spring for 2nd & 3rd gear synchronizers. Replace 3 springs, 148248 with 154424 6. SB 30-22, 03/07/94; 512TR starting with gearbox number 1797 A new shaft for the reverse idler gear that has new lubrication channels; replace 150887 with 155475 7. SB 30-23, 7/1/94; 512TR This is the differential change. a. From gearbox number 1370 replace welded differential 146769 with forged unit 155099 b. From gearbox number 1513 new ring gear with different bolts and locating dows to align with the differential assembly. Replace ring & pinion 110016 with 159069 c. From gearbox number 1513 replace 12 bolts M10X1.25 #103875 with 12 bolts #153710 M10X1 thread d. From gearbox number 1513 add 2 centering dowels 13916370 e. Updated bolts for gearboxes 1512 and prior: Replace 12 bolts 103875 M10X1.25 with 12 bolts 155750 M10X1.25. These are stronger bolts and can be used on all ring gear to differential mating where the old ring gear with M10X1.25 threads is retained. If the forged differential is installed it should be with these new stronger bolts. So any 512 with gearbox number 1370 or later will have the forged differential housing. All after gearbox number 1513 will have the forged housing plus the later ring and pinion gear with locating dowels & heavier bolts.
You made my day, I looked at my maintenance records from 1997 and listed on the invoice for all the parts that were replaced with the gearbox over hall was part# 155095 differential. I can stop stressing out now over every new sound I hear.
And .... which diff is that ... ? There exist 5 types of which only one is the forged (last) version. If it is the same as the first oem ones ... what then ? It will break again in that case .. Who has these numbers ... Cavallino70 ... please help us out ! (Sent him an SMS )
"a. From gearbox number 1370 replace welded differential 146769 with forged unit 155099" I don't know, I assume that the forged unit is what Spasso said above #155099 and if so, I'm happy
