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Before you rent a trailer or tow dolly from Route 66 Auto Repair in Upland, your vehicle needs a working hitch setup. This page explains what a tow package includes, how to read your hitch label, and what to test before moving day. At pickup, we run a free hookup check, and if your wiring or cooling needs paid work first, our technicians quote it in writing.
What is in a tow package?
- Receiver hitch: the square tube bolted to the frame, with a rating label
- Ball mount: the removable bar held in the receiver by a pin and clip
- Hitch ball: sized to match the trailer's coupler
- Wiring connector: powers the trailer's brake, turn and running lights
- Transmission cooler: fitted to many factory tow packages to handle extra heat
- Safety chain loops: the anchor points on the receiver for the trailer's chains
How do you read your hitch rating?
Look for a sticker or stamped plate on the receiver. It lists a class and weight ratings for the trailer and the tongue. Your ball mount and ball carry their own ratings too. The lowest number in that chain, including your vehicle's own rating in the owner's manual, is the one that counts. If the label is gone or unreadable, say so at pickup, since the hookup check compares your hitch rating with U-Haul requirements.
What if my trailer lights do not work?
Test at home with a helper or a plug tester: brake lights, left turn, right turn and running lights. A dead signal usually points to a blown fuse, a corroded connector, a broken ground or a failed converter module on vehicles that use one.
Tracing it is electrical diagnosis. Our wiring condition inspection finds the fault, the diagnostic fee is stated at the counter before testing, and a damaged run is handled under wiring harness repair with a written estimate first.
Do you need a transmission cooler?
Towing makes an automatic transmission run hotter, and heat is what ages the fluid and the clutches inside. Many factory tow packages include an extra cooler for that reason. If yours does not, and you tow often or climb long grades, ask about transmission cooler installation.
What if my vehicle has no hitch?
A U-Haul trailer or dolly needs a hitch already on the vehicle at pickup, so plan ahead. Call the counter at (909) 608-7699, describe your vehicle, and we will tell you plainly what we can take on. If a hitch is not practical in time, a moving truck or cargo van avoids the question.
How we check your hitch setup at pickup
Step 1: Look at the receiver
We find the rating label and look for cracks, rust-through or loose bolts.
Step 2: Check the ball mount
The pin and clip must be in place and the mount seated.
Step 3: Match the ball
The ball size is compared with the trailer coupler.
Step 4: Test the plug
Brake, turn and running lights are tested through your connector.
Step 5: Compare ratings
Your hitch rating and tongue weight are compared with U-Haul requirements.
What's included in the free hitch and hookup review
Included on the work order
- 01Receiver label and condition look
- 02Ball mount pin and clip check
- 03Ball-to-coupler size match
- 04Light test through your connector
- 05Crossed safety chains
- 06Hitch rating comparison with U-Haul requirements
Hitch and tow package: need-now or need-later?
Need now: call
- A cracked weld or loose bolt on the receiver
- A missing hitch pin or clip
- A dead brake or turn signal at the plug
Need later: book
- Surface rust on the receiver with solid metal underneath
- A faded but readable rating label
- Adding a transmission cooler before future towing trips
How pricing and timing work
The hookup check is free. Wiring diagnosis, cooler installation and other repairs are paid, with the fee stated at the counter and a written estimate before work begins. AAA members get 10% off parts and labor, up to $75, with the card at time of service. Same-day work happens when the board allows, so call before you drive over.
Caring for your hitch between trips
After a tow, pull the ball mount, clean the pin and store it dry. Cap the plug to keep dust out. Check the receiver bolts before the next trip. Ready to rent? Start with the free towing inspection page.
Frequently asked questions
Do I need a tow package to rent a U-Haul trailer?
You need a hitch receiver, a ball mount, a matching ball and working light wiring, and your vehicle must meet U-Haul's pairing rules. A full factory tow package may add a cooler and other parts beyond those basics.
What ball size does my trailer need?
It depends on the trailer's coupler, so check your reservation details on uhaul.com and the size stamped on your ball. We confirm the match during the free hookup check.
Does a bigger ball mean I can tow more?
No. The lowest rating in the chain sets your limit: the vehicle, the receiver, the ball mount and the ball. Ball size only has to match the coupler.