Gear ratio problems?

Tiny
CHARLES13907
  • MEMBER
  • 2004 TOYOTA TUNDRA
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
I have a 2004 toyota tundra double cab 4d with 4wheel drive sr5 vin #5tbdt44174s44202b with axel code A04B Axel code and A340F transmission code series code uck41IL I need a new rear end it went out going down the highway luckily I was able to switch over to 4wd amd limping it home I need to know the gear ratio so I can get a new one ive looked all over online and always says something different
Friday, July 11th, 2025 AT 11:29 AM

5 Replies

Tiny
STEVE W.
  • MECHANIC
  • 14,785 POSTS
Well it looks like there are 2 ratios in the crew cab. 4.10 or 4.08 Then locking or non locking. Service info doesn't show the ratio just how to pull the third member out and replace it.
However you might want to give these folks a call - https://eastcoastgearsupply.com/
They can likely tell you what the gears are and might have a few tricks as well.
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Friday, July 11th, 2025 AT 6:37 PM
Tiny
CHARLES13907
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  • 4 POSTS
Im sorry vin is 5tbdt44174s442028 and I thought it was a 4.3 is what one site says 4.556 is what another says I haven't see a 4.08
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Friday, July 11th, 2025 AT 7:25 PM
Tiny
STEVE W.
  • MECHANIC
  • 14,785 POSTS
Look at the third picture, Yours is the double cab, V8 4X4 auto Note the ratio for that? 4.10 That matches what I found in the interchange as well. Most of the info I see online applies to the vehicles prior to yours. The VIN doesn't show the ratio in service info so the best way would be to open it up and look at the actual markings.
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Saturday, July 12th, 2025 AT 6:23 AM
Tiny
CHARLES13907
  • MEMBER
  • 4 POSTS
How do you count out the ratio when you open up the differential
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Saturday, July 12th, 2025 AT 7:42 AM
Tiny
STEVE W.
  • MECHANIC
  • 14,785 POSTS
Most of the time there will be a stamping on the ring gear or face of the pinion. If not Mark a tooth on the ring gear and count the teeth. Now divide that number by the pinion teeth. So say you have a 35 tooth ring gear and an 8 tooth pinion = 4.38 ratio.
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Saturday, July 12th, 2025 AT 12:30 PM

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