a ute diff is only $200 drum to drum anyway..
I have a worked A14 rally car with a locked H145 in her and she handles the punishment quite nicely.....motorkhanas on tarmac as well as dirt khanacrosses

A h145 in food condition will survive for a decent time. Mine lasted behind a worked a14 for near 12months and id have to say i probably drive harder than most. No big clutch dumps but heaps or second gear hard hits and i must admit a few statics to slow movings ie. at least 6 tyres destroyed to the belts. First lasted 12months as i said. Second sounded a little whiney from the word go and broke after two weeks. Went to chirp/light up second and bang. Upon further inspection every planetry gear in half. Third lasted a month and never broke or sounded bad as i upgraded to a ute diff just in case. If you not into chirping or burnouts a h145 will be more than suitable.

mik i've seen you drive as well, and i reckon the h145 should survive a little while

Quote:

i have seen u drive mik thats why i said
leave the stocker in there

My A15 is bored out to 1600 and I still am driving on the same H145 after 5 years, you likely wont blow it through normal driving even giving it heaps, its dropping the clutch at 6000 rpm that will make it go bang.

obviously you havent seen me drive ange... cause im always at the back of the pack voluntarily though.

my answer would be to leave the standard diff in there

YES it will be happy to stay in its place

NO it wont go bang when u gun it through some twisties

they are completely different diffs made by different companies in different countries. The BW is alot larger and stronger in both the centre and axles. Try a search for borgwarner or 120Y diff - its been explained countless times before.

its not like im doing standstills or burnouts but if i see a nice bit of windy road ahead... and my right foot gets that twitch, i dont want to be thinking in the back of my head (is this the day the diff goes bang).

The 120y and corolla type Borg warner is still a h150 i understand, and have read the tech section but still have those 2 unanswered questions...(dont want yes no answers, a bit of depth would be nice)

1. Is the diff going to bolt in with no mods to the mounting points on the coupe rear end.

2. is the 120y drive shaft ok to use? If its 20mm longer or shorter it should no make much of a difference, just mount the diff 10 or 20 mm different on the rear end.

Avoid the 'shock loads' & the H145 should hold up for quite a while.