A couple of questions about my new err old truck... 1999 SD F350.

[cmb1998]

I had been looking for a truck for quite a while, been reading alot of posts as to what I wanted to look for. I initially was looking at a diesel, but started looked for a gasser after reading alot on here... I needed something to occasionally pull a construction trailer, boat on the weekends, ect...

I picked up a 1999 4x4 F350 V10 Crew Cab 4x4 5 spd man trans with 90k Miles last week . 33in tires. The previous owner set the truck up for towing.

A couple of questions for anyone that can help...

1) How can I figure out what the gears are on this thing?

2) How can I figure out if this thing has a limited slip rear end?

3) Running down the highway at 60 mph I am running about 2200 RPMs in 5th. Is that high for this motor?

4) I was on the highway trying to merge with traffic the other day and had to get into the gas. I sped up to 75mph to get into traffic and I started getting a beeping from the dash. Is this normal?

Thanks!

Chris

[klhansen]

I can help with questions 1 and 2.

Crawl under and look for a metal tab under one of the rear differential cover bolts. It'll have some numbers and letters on it.

3 73 would indicate an open 3.73 ratio
3L73 would indicate a limited slip 3.73 ratio

Or you could look at the code you find on your build sticker (on the driver's door rear post) under "axle" and compare with this list:

41 — 3.73 non-limited slip, F-350, single rear wheels
42 — 4.10 non-limited slip, F-350, single rear wheels
43 — 4.30 non-limited slip, F-350, single rear wheels
46 — 4.56 non-limited slip, F-350, single rear wheels
D1 — 3.73 limited slip, F-350, single rear wheels
D2 — 4.10 limited slip, F-350, single rear wheels
D3 — 4.30 limited slip, F-350, single rear wheels
D6 — 4.56 limited slip, F-350, single rear wheels
61 — 3.73 non-limited slip, F-350, dual rear wheels
62 — 4.10 non-limited slip, F-350, dual rear wheels
63 — 4.30 non-limited slip, F-350, dual rear wheels
66 — 4.56 non-limited slip, F-350, dual rear wheels
F1 — 3.73 limited slip, F-350, dual rear wheels
F2 — 4.10 limited slip, F-350, dual rear wheels
F3 — 4.30 limited slip, F-350, dual rear wheels
F6 — 4.56 limited slip, F-350, dual rear wheels