Ford Sierra 6.5 rear diff
30-05-2018, 09:31 PM
#1
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Ford Sierra 6.5 rear diff
Some early Sierra MK1 had a 3.92 rear non lsd 6.5 diff. I believe the crownwheel and pignon wheel were lighter than the 7 or 7.5 versions. Some 1.3 engined Sierra are supposed to have them
Problem is that seem to be an urban myth. I cannot find any info on that diff let alone find one for sale. Would be really gratefull for any information this forum can give me on this diff. Pointing me towards one would really make my year (sad life; sorry).
Quaife & Bara have heard from them but never seen one. Really hope somebody on here can help me.
rgrds,
Mies
Problem is that seem to be an urban myth. I cannot find any info on that diff let alone find one for sale. Would be really gratefull for any information this forum can give me on this diff. Pointing me towards one would really make my year (sad life; sorry).
Quaife & Bara have heard from them but never seen one. Really hope somebody on here can help me.
rgrds,
Mies
31-05-2018, 12:18 PM
#2
I came across a (I believe) 6.5" rear diff about 10 years ago. According to the tag it was a 3.62:1. It looked very much like a 7", but it was very slightly smaller. Also the drive shafts of the 7" diff didn't fit into the 6.5" one.
Here are some pics of the 6.5" and 7" next to each other. The darker one is the 7". Unfortunately I don't have it anymore. I gave it back to the guy selling it to me as it didn't fit my car. From what I can make out of the tag on the diff it said: 83BG4006CD **5F4N3.62.
Here is some info on what diffs were fitted to which cars.
Here are some pics of the 6.5" and 7" next to each other. The darker one is the 7". Unfortunately I don't have it anymore. I gave it back to the guy selling it to me as it didn't fit my car. From what I can make out of the tag on the diff it said: 83BG4006CD **5F4N3.62.
Here is some info on what diffs were fitted to which cars.
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Mies (31-05-2018)
25-02-2024, 06:37 PM
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6.5" diff ratio 1.3 OHC
I pumped to this old thread when I tried to find out about Sierra 1.3 OHC diff ratios. I have quit early 1.3 5 door Sierra GL (with turbo installed when new) and I'm quit shure finish user manual listed it as having 4.xx diff. It is in quit hard place to reatch now so I report back when snow melts if somebody is still interested. I have many Sierras and parts so I have looked at it and drive safts and shell are smaller than 7". Turbo Sierra has now 7" ZF diff and whole axle but I saved the old one.
Vin plate said axle B so it's 3.77 but there are letters and numbers for over 4.xx ratios and I'm still sure that I have seen ratios over 4 marked for 1.3 OHC.
Vin plate said axle B so it's 3.77 but there are letters and numbers for over 4.xx ratios and I'm still sure that I have seen ratios over 4 marked for 1.3 OHC.
Last edited by SLEI; 25-02-2024 at 07:47 PM. Reason: New info
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