DIY swap from Titan to Quaiffe in Sierra housing.

[DJ.]

After reading the excellent thread here last summer, I discovered the preload on my Titan lsd had dropped below the magic 20 ft/lb. After also reading that I should have been having it serviced at 10,000 mile intervals (less than two years for me) I decided to swap to a Quaiffe ATB.

I'm not going to go into Quaiffe v better plate designs, all I have to say is it is a personal choice and knowing other people running Sevens with ATBs, I decided it was a better option for me.

Anyway, the point of this thread is that I have just opened a diff for the first time and swapped the two units over. If you are handy with changing bearings and using a dial gauge it is possible to DIY, and with the ATB delivered from Burton at £480, I did it for less than £600 once I had bought crown wheel bearings, driveshaft oil seals and new crown wheel bolts. It is important to say that I didn't disturb the pinion bearings. If you have movement in the pinion, a leaking seal here or your diff needs a general overhaul it is better to seek specialist help.

If you want a guide I have written one up here: https://www.southernkitcars.com/forum/viewtopic.php?f=7&t=11189

And you can download the Ford guide here: http://www.fordscorpio.co.uk/manual/rearaxle/DiffOverhaul.pdf

Duncan

 

[ScottR400D]

Good write up, Duncan, very interesting and a fine choice if you're happy with the characteristics of the quaife. 

[DJ.]

Thanks

[Wrightpayne]

Duncan,

I have changed the pinion seal on my Sierra diff. The diff has one nut to preload the bearing (and set the collapsible spacer) and a second nut to hold the drive flange on. It is only the latter that needs undoing to change the seal.

Other diff types only have one nut and generally have to be rebuilt when changing the oil seal.

Well done on rebuilding yours and giving others confidence to do the same. 
 

Ian

[DJ.]

Thanks Ian that is useful to know.